@gairsty I know a few people that are very much enamored with them. Have a colleague that has used the a trio of the 40-50 USD priced units to build a MPLS network on a sheet of plywood as a showcase. I know that the Mikrotik equipment is very popular in the WISP space just like Ubiquiti is.
I personally have Ubiquiti equipment at my house. I know that the Mikrotik has more feature capabilities currently but depending on model there are licensing add-ons for certain functionality.