Really? I haven't used Ubiquiti hardware in a few years, but my recollection was that their stuff was inexpensive, easy to set up, and very powerful. We used their Bullet and Nanostation line of products.
Also their web interface has terrible memory leaks which causes loads of other issues.
Don't forget the management network interface that just stops being able to be pinged until you reboot. Have seen this on everything up to AirFibers.