I recently picked up the TP Link Deco E4 Wifi Mesh with 3 modules. It comes with wall plugs for each module and an ethernet cable to plug into your modem. It runs on Wifi 5 standards with 2.4GHz and 5 GHz wifi bands. It’s rated for 867 mbps on 5GHz speed and 300 mbps on 2.4 GHz. They’re well designed and are in the shape of a cylinder that’s similarly sized to a 1 lb bag of coffee beans.
At this time, it is set up in a 1400 sq. ft. house with one module on each floor. Internet speeds as tested with the router and modem provided by the ISP is around 240 mbps down and 45 mbps up. With the Deco wifi mesh system, the speeds are drastically slower, but still usable. The speed test results I got were 85-90 mbps down and 35-40 mpbs up. Unfortunately the download speeds are quite a bit lower than the incoming speeds from the internet provider, but upload speeds are acceptable with the internet service being used. In regards to area coverage, there are no dead zones for internet and wifi coverage within the house.
In conclusion, the TP Link Deco E4 Wifi mesh system is fine as an entry level system, but would recommend one that can handle higher bandwidth if you have the budget for it.