I've been running Unifi since ~2014 and it's been rock solid. I forget that they are there most of the time.
The only headache has been setting up a Canon printer -- it doesn't know what fast roaming is and won't prompt for a password if it's enabled. You must disable that first, connect the printer, and then turn it back on.
I have tens of thousands in unifi gear, it is pretty damn good but there are bugs, and unfortunately their support sucks. It is still miles ahead of any other consumer networking hardware.