My default response when a family member or friend complains about poor wifi (and it's actually the wifi) is to suggest they buy/throw a 2 pack of DECO's at them. The downsides (and most of them really aren't) are as follows:
It's app managed rather than browser, so in the unlikely event TPL dropped the ecosystem, you are screwed.
You can only have main/guest/IoT SSID's.
It manages the channel etc. though in fairness, it seems to do a reasonable job.
No VLAN support.
More hardware revisions than seem reasonable - partially down to supply chain issues during plague times.
Updates aren't consistent - some models get an update, others don't, same with some hardware revisions of the same model.
Can be quirky with upstream switches, won't play nicely with my Aruba for some reason, but the generic TPL and Chinese switches are fine.
Usual mesh rules apply, hard wire them or accept less than line speed - at one point during a downstairs refurb I had to run a pair in bridge mode to my router, they still managed upto 800mbit node to node between floors. Other than that, they're basically fire and forget with easy management, diagnosis and painless automated updates that don't generate any further calls for help. I've lost track of the number I have installed, but we have four here and i've got 5 other sites running them off the top of my head now. This is based on the X20/50 generations, although one of those sites has an older AC1200 version supplied by the ISP, I personally wouldn't bother with anything that old, it's not priced significantly differently to the X series whenever I have been buying.
