There are also Mesh enabled Versions of APs from them, but they also have something like BT offers:
It's mesh I'm interested in, the BT option you plug the AP into your router then set up and configure via an app on your phone, unplug the AP from the router and plug into mains in your home then add another. This creates a mesh wireless with it's own SSiD (you can set your passkey), to me this is simple and straight forward. The amplifi is straightforward, plug the base into your router (which I assume you would disable the wifi) then plugin the 2 mesh ap's great piece of kit, but for £320 + to me it's not justifiable.
At school we use Ruckus which I have been trying to get the school to upgrade, it's getting old and it can struggle with connectivity when everything is in use, but it's still working, so until it dies then it will be changed.