New AP's, controller and POE managed switches are top notch. The biggest issue with the 4400 router is buggy firmware. There are quite a few problems that Luxul is fully aware of, yet they have not released an update since last year.
For example - after power outage router losses ISP connectivity. I was able to create workaround by utilizing WattBox power sequencing feature and delaying router "PowerON" by 180 sec. after powering modem . There is also a known issue with VPN connectivity .
I have called their tech support at least four months ago , they said new firmware will be released within two weeks ( I guess an ex-RTI emloyee :) ) , nothing so far , very aggravating .......