The problem with UniFi is people read about how great it was for someone who somewhat haphazardly flung a few APs around their house and lived happily ever afte

The problem with UniFi is people read about how great it was for someone who somewhat haphazardly flung a few APs around their house and lived happily ever after... and for many it's just not going to work out that way. A lot of work can go into making WiFi work well. With multiple APs you've got to adjust the Transmit power (defaults to Auto, which means High, which is generally bad). For good roaming, increasing the minRSSI is critical. 5G and 2.4G have very different propagation characteristics so they need to be optimized individually. With several APs you may even want to disable 2.4G on some of them. Band Steering may or may not play nicely with the devices you have. Some devices have trouble if they can see many APs advertising the same SSID -- Ring Doorbells are notorious for not being willing to associate to an SSID at all if many APs are advertising the same SSID. At my old house I got away with one AP placed centrally in the attic and another in my detached garage. At my new house, at about 2.5X the size, I'm running 5 APs and it has taken me a solid month of fiddling to get my devices consistently associating to the best AP and roaming appropriately.