Yes the noise floor is bad, but we get about a 2 mile range which covers a huge amount of people in Manhattan. The Ubiquiti sector antennas use TDMA so it is not standard 802.11ac.
That's a LiteBeam Gen1 installed in the east village on 5th St connected to 375 Pearl St downtown. The gen1 actually has a stronger signal than the gen2, so this is a bit better than our usual connection.