This Ubiquiti stuff is addictive..
Mine is all installed in a detached house.
I was having major problems with my 2 Draytek AP902 access points, and they were struggling for bandwidth for some reason with only 4 users. After logging a ticket and waiting 2 days without reply, and being unable to resolve via the forums, I bit the bullet and decided to ditch them.
Replaced the access points with 2 Unifi AC Pro access points, and my wifi issues were instantly resolved.
I'm running the controller software on a RPI3 - works a treat.
Then I decided to replace the Draytek router with a USG - it's great having the deep packet inspection, and makes the dashboard all the prettier..
And now... bought a US-8-150W switch, just because again it integrates nicely with the dashboard, and I've powered one AP over PoE - the other is not so simple, as there isn't a direct cable run from the AP to the UniFi switch - it runs through a little 5 port unmanaged switch. Need to sort that out.
Looking at getting a couple of Hikvision cameras when funds allow (prefer to go for official UK instead of chinese so that firmware updates don't kill them) so the switch will come in handy.
So, really pleased so far - switch is expensive I guess, but the USG is great value for money, and the APs are in normal AP ballpark price wise.