Ubiquiti has a polished interface that's relatively simple to use for something with enterprise-ish level features. They also have some pretty good docs. For example, their article on the harms of Broadcast/Multicast packet storms [0] is useful even if you're not using their products. Same goes for the RF Antenna patterns docs [1].
That said, my next router/gateway won't be from Ubiquiti. Though I'll keep using UI access points for now.