Note, anybody interested in these, you only have to run the controller once during setup. My controller consists of a dusty laptop I haven't used in 2 years sitting in my closet powered off with my UAP happily running without a single problem since setup. You can ssh into the UAP devices and do firmware upgrades or change configurations without the controller. https://community.ubnt.com/t5/UniFi-Wireless/Firmware-upgrad...

I have an EdgeRouter Lite ($100 or so) and an older UAP regular/non-pro Wifi AP.