Just replaced my Google WiFi mesh network with a TP Link Deco P9 mesh w/ Powerline backhaul. It was about $199 on Amazon and delivered next day. Total setup time was about 10 minutes - and that included unboxing.
" The Powerline Deco P9 adds a third lane for data to travel through, similar to a Tri-band mesh router, to create stronger connections between Deco units and increase the network's overall performance, eliminating signal interference from walls and other objects."
So, if you've got a decently sized house or have multiple walls/floors that your signal travels through top to bottom, one end to the other, this might be what you're looking for.
I have had the Google WiFi connected to my Fiber FTTH modem for many years (since Google wifie v1) but it was near end of life and would occasionally drop the signal for no good reason making me thing they were failing. Some would go offline and I had to restart them manually.
The TP Link Deco P9 mesh w/ Powerline backhaul comes with 3 devices (with Google I had 7) and the signal is much stronger everywhere AND with the powerline backhaul, it doesn't interfere with itself. Pretty slick! There is no "special plug" for powerline, just plug it in and the backhaul back to the main device travels over powerline instead of wifi. You can add additional Deco devices as needed. The P9s are about the size of a can of big Pillsbury biscuits
As you do with any WiFi changes, you'll need to reset your WIFI config entering the new ssid & pw on all wifi connected devices (computers, Roku, AppleTV, smart devices, tablets, phones, etc. etc. etc.).

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" The Powerline Deco P9 adds a third lane for data to travel through, similar to a Tri-band mesh router, to create stronger connections between Deco units and increase the network's overall performance, eliminating signal interference from walls and other objects."
So, if you've got a decently sized house or have multiple walls/floors that your signal travels through top to bottom, one end to the other, this might be what you're looking for.
I have had the Google WiFi connected to my Fiber FTTH modem for many years (since Google wifie v1) but it was near end of life and would occasionally drop the signal for no good reason making me thing they were failing. Some would go offline and I had to restart them manually.
The TP Link Deco P9 mesh w/ Powerline backhaul comes with 3 devices (with Google I had 7) and the signal is much stronger everywhere AND with the powerline backhaul, it doesn't interfere with itself. Pretty slick! There is no "special plug" for powerline, just plug it in and the backhaul back to the main device travels over powerline instead of wifi. You can add additional Deco devices as needed. The P9s are about the size of a can of big Pillsbury biscuits
As you do with any WiFi changes, you'll need to reset your WIFI config entering the new ssid & pw on all wifi connected devices (computers, Roku, AppleTV, smart devices, tablets, phones, etc. etc. etc.).

If you click on the picture or link, we may earn a commission if you buy this or other products from Amazon.com