ASUS ZenWiFi AC CT8 Review: Solid Mesh, Ageing Standard

Look at the spec sheet for the ASUS ZenWiFi AC (CT8) and cross-reference it with what the 352 owners who've actually lived with it are saying, and a pretty clear picture emerges: this is a mesh system that genuinely delivers for most houses, with a handful of quirks that'll bother a specific type of buyer more than others. It's not perfect. But it's also not the usual overpriced disappointment.

The CT8 came out in 2019 as ASUS's first proper consumer mesh push, and at the time it was genuinely impressive kit. The question now, with the price still sitting in premium territory, is whether it holds up against newer competition. Short answer: largely yes, with caveats. Longer answer: read on.

What this is, fundamentally, is a two-node mesh networking system built around the AC3000 Wi-Fi standard, a dedicated wireless backhaul band, and ASUS's AiMesh platform. It's aimed squarely at people with larger homes who've given up on their ISP's router and want something that actually covers the whole house without running Ethernet to every room. Whether it earns that premium price is what we're here to work out.

Each node has four Gigabit Ethernet ports (one WAN, three LAN), so you're not stuck with wireless-only connectivity if you want to hardwire a games console or a smart TV. There's also a USB 3.0 port on each node, useful for a shared network drive or printer. The antenna configuration is internal, which keeps the units looking clean on a shelf rather than sprouting aerials like a Cold War communications tower.

Coverage is rated at up to 5,400 square feet across both nodes combined. ASUS claims the system supports up to 100 devices simultaneously. The system runs on ASUS's AiMesh platform, which means it's compatible with a wide range of other ASUS routers if you want to expand later. Parental controls and network security come via ASUS's AiProtection Pro, powered by Trend Micro, and crucially, ASUS has committed to providing these at no ongoing subscription cost. That's a meaningful differentiator at this price point.

What the spec actually supports is meaningful, though. The CT8 uses 3x3 MU-MIMO antennas on each node, which means the signal has more spatial streams to work with than a basic dual-band router. Owner reports across the 352 back this up: the majority of people covering three and four-bedroom homes report solid coverage throughout, including upstairs bedrooms and gardens, when the two nodes are sensibly positioned (one downstairs, one upstairs, or one at each end of a longer property). The average rating of 4.1 stars from those owners is a reasonable signal that the coverage claim isn't pure fantasy.

Where it gets more complicated is in genuinely large or awkward properties. A handful of owners in detached houses with outbuildings or unusual layouts report that two nodes isn't quite enough, and they've had to add a third via ASUS's AiMesh compatibility. That's a solvable problem, but it does mean extra cost. The system also supports wired backhaul if you can run an Ethernet cable between nodes, which will always outperform wireless backhaul in a challenging building. Most people won't bother with the cable, and the wireless backhaul handles the majority of homes well, but it's good that the option exists.

Owner reports here are broadly positive for a Wi-Fi 5 system. People consistently describe speeds holding up reasonably well at distance, which makes sense given the dedicated backhaul design. When the node-to-node link isn't competing with your devices for airtime, the far node has more bandwidth to work with. You're not going to see the same throughput at the far end of the house as you would sitting next to the primary node, that's just physics, but the drop-off is less dramatic than you'd get from a cheaper mesh system or a single router with a range extender bolted on.

Where owners flag issues is under very heavy simultaneous load. The CT8 doesn't support OFDMA (orthogonal frequency-division multiple access), which is a Wi-Fi 6 feature that lets the router serve multiple devices at the same time on the same channel rather than making them queue. On a network with thirty-plus active devices all doing things at once, this matters. It's not a disaster, and the 3x3 MU-MIMO does help, but if you're running a genuinely dense smart home alongside heavy streaming and gaming, a Wi-Fi 6 system handles that specific scenario more efficiently. For most households, though, the CT8's sustained performance is solid.

The CT8 avoids that trap. With the backhaul on its own dedicated channel, the client-facing 5GHz band stays clear for your devices. The practical result, which owner reports consistently support, is that the far node behaves more like a proper access point and less like a signal-degraded relay. People describe moving around the house and maintaining usable speeds without the kind of cliff-edge drops you get from a range extender setup. Roaming between nodes is handled automatically, and most owners report it working without much drama, though a few mention that older devices occasionally stick to the further node rather than switching to the nearer one. That's a client-side behaviour that no mesh system fully controls.

Wired backhaul is supported if you want to run an Ethernet cable between the two nodes. If you can do this, you absolutely should. It removes the wireless backhaul entirely, gives you the full bandwidth of a Gigabit link between nodes, and makes the whole system behave like two wired access points. Most people won't have the cable infrastructure in place, and the wireless backhaul works well enough without it, but for anyone building out a home network properly, the option being there is genuinely useful. ASUS's AiMesh platform also means you can mix and match compatible ASUS routers if you need to expand beyond two nodes.

The 3x3 MU-MIMO (multi-user, multiple-input, multiple-output) configuration helps here. MU-MIMO lets the router communicate with multiple devices simultaneously rather than taking turns, which reduces the queuing effect on busy networks. It's not as efficient as the OFDMA found in Wi-Fi 6 systems, which handles device density even better, but it's a meaningful improvement over older 2x2 configurations. Owner reports don't flag device-capacity issues as a common complaint, which suggests the system handles real-world household loads comfortably.

Where you might start to feel the limits is in a home that's both large and extremely device-dense, say, a five-bedroom house with multiple people working from home, heavy 4K streaming, and a full smart-home setup running dozens of IoT sensors and cameras. In that scenario, a Wi-Fi 6 mesh system with OFDMA would handle the device scheduling more efficiently. But that's a fairly specific edge case. For the majority of households, the CT8's capacity is genuinely adequate, and the dedicated backhaul means the devices on the far node aren't being starved of bandwidth by the mesh overhead.

More useful than the marketing suggests, actually. The majority of devices in most homes still connect on Wi-Fi 5 or older. Your ISP's broadband connection is almost certainly well under 1Gbps (most UK households are on 100 to 900Mbps packages), and the CT8's throughput is more than capable of saturating that. The real advantage of Wi-Fi 6 is OFDMA for dense device handling and better performance in congested environments, not raw speed. If your home isn't particularly dense with devices and you're not in a flat surrounded by neighbours' Wi-Fi networks, the practical difference between Wi-Fi 5 and Wi-Fi 6 in daily use is smaller than the marketing implies.

That said, future-proofing is a real concern at this price. If you're buying a premium mesh system today and expecting to keep it for five or more years, Wi-Fi 6 is the sensible minimum, and Wi-Fi 6E starts to look attractive for larger households. The CT8 won't get a hardware upgrade to support OFDMA or the 6GHz band; those are physical limitations. So if you're buying new right now at full premium price, the honest advice is to think carefully about whether a newer Wi-Fi 6 system at a similar or slightly higher price makes more sense for the long term. The CT8 was excellent value when it launched. The calculus has shifted a bit since then.

AiProtection Pro is the headline security feature, powered by Trend Micro. It includes real-time network monitoring, malicious site blocking, and vulnerability protection. The key thing here is that ASUS offers this at no ongoing subscription cost, which is a genuine differentiator. Competitors like Netgear's Orbi push you toward a paid subscription for equivalent features. Whether you trust Trend Micro's approach to network security is a separate question, but the fact that it's included for life without an annual fee is a meaningful practical advantage.

Parental controls are solid for a router-level implementation. You can set time limits per device, filter content categories, and pause internet access for specific devices. It's not as granular as a dedicated parental control service, but it handles the basics well and it's built into the app without extra cost. Guest network support gives you three separate SSIDs (network names), which is useful for keeping IoT devices on a separate network from your main devices. That's good security practice, and having it available without digging into advanced settings is appreciated. VPN server and client support is also present for the technically inclined, though most buyers won't touch it.

The ASUS Router app handles setup and ongoing management on iOS and Android. Owner reviews are broadly positive about the app's core functionality, though a minority report occasional instability and connectivity glitches with the app itself (as opposed to the router). The web interface, accessible via a browser on your local network, is more comprehensive and more stable if you want to dig into advanced settings. For most buyers, the app is fine for day-to-day management.

The reboot question is worth addressing directly, because it comes up in owner reviews. A subset of owners report occasional stability issues requiring a reboot every week or two. This seems to be more common in specific firmware versions and for a minority of users rather than a widespread pattern. The majority of the 352 reviewers don't flag this as a persistent issue, and the 4.1 average rating suggests most people are happy with long-term stability. But it's not zero, and if you're the kind of person who expects to set a router up and never think about it again, it's that ASUS's kit generally rewards occasional firmware updates and the odd scheduled reboot more than, say, a basic ISP-supplied box does.

The ASUS Router app covers the basics well: network name and password, device management, parental controls, QoS settings, and firmware updates. It's not the slickest app interface in the category (Eero's app, for example, is more polished), but it's functional and covers more ground than most. The web interface at router.asus.com gives you access to the full range of settings, including more advanced options like VPN configuration, DNS settings, and detailed traffic monitoring. Most buyers will never need it, but it's good that it exists for those who do.

Ongoing management is reasonably low-maintenance for the majority of owners. The system handles band steering automatically (directing devices to the most appropriate frequency band) and roaming between nodes without manual intervention. You can name individual nodes in the app, which helps when you're trying to work out which one a device is connected to. One thing: the CT8 doesn't support the kind of per-node SSID separation that some power users want for precise device placement. Everything runs under the same network name by default, which is the right choice for most households but occasionally frustrates people who want more control over which node a specific device connects to.

The ports are all Gigabit (1GbE), which is the standard for this generation of kit. There's no 2.5GbE or 10GbE here, which matters if you have a multi-gigabit broadband connection (full-fibre services above 1Gbps are becoming more available in the UK) or a NAS device that benefits from faster wired throughput. For the vast majority of UK broadband connections, Gigabit is still more than enough. But if you're on a 2.5Gbps or faster connection, or you're planning for one in the next few years, the CT8's port speeds are a limitation worth factoring in.

The USB 3.0 port on each node supports network-attached storage (plugging in a USB drive and sharing it across the network) and network printing. It's a useful addition that some competitors omit. Performance for USB storage sharing is adequate for basic file access and backup, though it's not a substitute for a dedicated NAS if you're doing anything serious. Link aggregation is not supported on the CT8, which is a minor limitation for power users but irrelevant to most buyers. The overall port setup is practical and well-suited to the system's target market.

The CT8's advantages over both are the no-subscription security and parental controls, the AiMesh ecosystem compatibility for future expansion, and a firmware feature set that's deeper than TP-Link's at the same price. Its disadvantages are the Wi-Fi 5 standard (no OFDMA, no 6GHz band) and the Gigabit-only ports. If future-proofing is your priority, the Deco XE75 Pro is the more sensible buy right now. If you want the deepest feature set with the lowest ongoing cost, the CT8 still makes a case for itself, particularly if the price has dropped from its launch level.

The honest limitations are equally clear. Wi-Fi 5 means no OFDMA, which matters in dense device environments. The Gigabit-only ports are a constraint if you're on or planning for a multi-gigabit broadband connection. And buying a 2019 Wi-Fi 5 system at premium prices in 2024 means you're getting less future-proofing than a Wi-Fi 6 or Wi-Fi 6E alternative at a similar price point. The CT8 was a great buy at launch. Whether it's a great buy now depends almost entirely on what it's currently selling for.

If the price has come down to a level that reflects its age relative to Wi-Fi 6 competition, it's a solid recommendation for households with larger homes, moderate device counts, and no multi-gigabit broadband. The coverage is real, the backhaul design is sound, and the ongoing cost of ownership is lower than Netgear's subscription-heavy alternative. But if it's still priced at or near Wi-Fi 6 mesh territory, the honest advice is to spend a bit more and get the TP-Link Deco XE75 Pro or a comparable Wi-Fi 6 system instead. You'll get OFDMA, better device handling, and a hardware platform that won't feel dated in two years. The CT8 is good kit. It's just not 2024's best answer at a 2024 premium price.

Who should buy it: Owners of three and four-bedroom homes with patchy coverage, on standard broadband connections under 1Gbps, who want a feature-rich system with no ongoing subscription fees and room to expand via AiMesh.

Who should skip it: Anyone on multi-gigabit broadband, anyone building a dense smart home with 40-plus active devices, and anyone buying new at full premium price when Wi-Fi 6 alternatives are available at similar cost.

The smarter buy if you don't need this one's specific strengths: The TP-Link Deco XE75 Pro (2-pack) gives you Wi-Fi 6E, OFDMA, and a 2.5GbE WAN port for future-proofing, and TP-Link's app is clean and reliable. If you're spending serious money on a mesh system today, that's the direction to look first.

Our rating: 7.5 out of 10. Excellent execution of a design that was class-leading in 2019. Still competent in 2024. Just not the best value at full price when newer standards are available at comparable cost.