It is working great!

The snakeoil comment was about the MIMO functionality which I can only really test via my iPhone7 at the moment with the 2x2 MIMO client to the 4x4 MIMO AP (UAP-AC-HD). Once I get the MacBook Pro I'll have a 3x3 MIMO client.

I bought primarily because if this animation explaining the benefits of MIMO. https://unifi-hd.ubnt.com/

The marketing worked on me!