TP-Link Deco X20 (3-pack) review: a Wi-Fi 6 mesh system for a working home

Here are the numbers that tell you most of what you need to know about the Deco X20. In a TP-Link forum post, an owner of a three-pack on 940 Mbps fiber got near full speed when wired to the main unit, about 650 Mbps when wired to a satellite, and around 250 Mbps over Wi-Fi. Same house, three very different results. Which of those you live with depends on one thing: whether you can run a cable between the units.

Product image from the Amazon listing.

What Three Small Towers Get You

Start with what TP-Link promises. The TP-Link product page describes a dual-band Wi-Fi 6 system rated AX1800. That figure adds 1201 Mbps on 5 GHz to 574 Mbps on 2.4 GHz. Each unit is a small tower, 110 by 110 by 114 mm, with two Gigabit Ethernet ports. A three-pack, TP-Link says, covers up to 5,800 square feet and supports over 150 devices. Those are maker claims. Your walls will have a say.

The word that matters most on that page is dual-band. Pricier mesh systems add a third radio used only for traffic between the units. The X20 does not. A hands-on review at Cryovex points this out, noting that the units share their two bands with your devices and manage the flow as they go. Every megabit a satellite sends back to the main unit is airtime your laptop does not get. That is why the satellite numbers below look the way they do.

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Wireless Backhaul: Coverage First, Speed Second

The owner in that opening post lives in a two-story townhome of about 1,800 square feet, with about 25 devices, no Ethernet between units, and a 2020 MacBook Pro that managed above 600 Mbps on his old router’s Wi-Fi. On the Deco the same laptop linked at 866 Mbps and downloaded at about 250 Mbps. A second copy of his question got a reply saying that wireless backhaul limits throughput and “the best mesh setups include the use of a wired backhaul.” The thread ended there with no fix recorded.

A longer thread from 2020 and 2021 shows the same pattern from other homes. One owner on a 900/500 Mbps plan got 450 to 540 Mbps near the main unit and only 120 to 140 Mbps on a satellite. Another with a 1 Gbps plan saw 250 to 300 Mbps, against 600 to 700 Mbps on an ISP router. Yet a desktop with a good Wi-Fi 6 card reached about 860 Mbps. So the system can go fast, but it needs the right client near the right unit.

I would not call any of that a failure, and here is the arithmetic. A video call needs a few megabits, so 120 Mbps on a satellite is plenty for Zoom, Teams and streaming. If a home has a dead room, moving from 100 Mbps to much more is a real gain, and the Cryovex reviewer saw exactly that kind of jump in a bedroom. An owner on ProductReview praises “amazing ability to blanket your home in strong Wifi signal.” On OzBargain, another says “Coverage is great” and that the missing dedicated backhaul has not been a problem yet.

Big file work is a different story. At 120 Mbps you move about 15 megabytes a second. Copy a 10 GB folder from a satellite room and you wait around 11 minutes. So if you pay for gigabit and expect that speed everywhere over Wi-Fi, this is the wrong system.

Product image from the Amazon listing.

Wiring the Units Helps, With a Few Traps

Ethernet backhaul is an option on every unit, and it is the single best thing you can do for this system. There are two things to plan for.

First, the ports run out quickly. Each unit has two. On the main unit, one goes to your modem, which leaves one. On a wired satellite, one goes to the backhaul cable, which leaves one. An OzBargain commenter counted six ports on a three-pack before any of that. If you have a desktop, a NAS and a printer in one room, buy a small switch.

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Second, wired backhaul has not always behaved. The original poster in that 2020 thread ran X20s through an 8-port switch and found one satellite connecting over Wi-Fi to a nearby unit after a reboot, with speeds under 10 Mbps. He blamed firmware, though TP-Link never confirmed that, and a later run of the app’s network optimization brought his speed up to more than 450 Mbps in the early morning. An owner on ProductReview warned that wired satellites need a sensible daisy chain or star layout. I would check in the app that each unit really shows a wired link after you finish.

Work Calls and the NAS

This is where the evidence runs out. I wanted to find owners measuring latency on video calls, roaming between nodes in the middle of a meeting, or NAS throughput across the mesh, and found none. The main poster here had fast roaming turned off, so his thread tells us nothing about it.

What I can say is limited. For a NAS, plug it into a Deco port, and put your main work computer on a cable to the same unit if you can. That keeps your biggest transfers off the Wi-Fi. For calls, the reports of speed do not worry me, and the reports of stability are mostly good. Your risk is a short drop, so do a test call while walking the house before your return window ends.

Product image from the Amazon listing.

Stability, in Owners’ Words

The stability reports lean positive. ProductReview owners say “extremely stable” and “very stable under multi access,” and one reports “no drop outs.” A longer-term owner there calls the routing “rock solid” while adding that a satellite has dropped off the network about three times, and that a system reboot cured it. Another traced occasional dropouts to Trend Micro’s home security software and not to the Deco at all. That reviewer also gives the TP-Link support engineer high praise.

Forum posts skew darker, as forums do. The 2020 thread includes reports of slow speeds that nobody fully solved. I read that as a warning about early firmware more than a verdict on the hardware, but I cannot be sure.

The App Decides What You Can Do

You set up and manage the Deco through a phone app. TP-Link lists router and access point modes, a free basic tier of HomeShield security and parental controls, and a paid Pro tier. Some owners like it. One calls the app “well designed and easy to use.” Others are less kind. “The admin app is very limited,” says one owner, and another objects that it asks for GPS access and personal details. The OzBargain owner who loved the coverage called the app “the huge letdown” and complained about NAT issues with torrents and FTP.

ProductReview’s sub-scores also suggest setup is not as easy as the box claims, and two owners there describe hard installs, one needing four calls over three nights. If you want a web page with every setting, look elsewhere. If you want to tap three buttons and forget about it, the app is enough.

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Check Which Hardware Arrives

TP-Link has made this model in many hardware versions, and its download page lists a long run of them. Most of the detailed complaints here come from V1, some on quite old firmware. I cannot tell you which version your box will contain, or whether later versions fix the slow Wi-Fi reports. Read the label, and update the firmware before you judge the speed.

Good for Coverage, and Best With a Cable

Picture a large home with weak spots, a plan under about 300 Mbps, and someone who would rather use an app than a settings page. For that home, I think the X20 three-pack is a fair choice. If you can run a cable to at least one satellite, it looks even better.

Skip it if you pay for gigabit and want that speed at every desk over Wi-Fi, if you need many wired ports, or if you want deep settings. In those cases a tri-band system or a wired access point will serve you better.

For that patchy house, the TP-Link Deco X20 (3-pack) should fix the coverage, so long as you judge it on reach and steady calls and keep the top speed of your plan out of the test. This is an affiliate link. As an Amazon Associate I earn from qualifying purchases.