I loved the ubiquiti stuff for years. Then one day two years ago macs suddenly could no longer reliably connect to the outside world even with a strong wifi connection to the AP. I would send pings and have 40% packet loss. Weirdly I could ssh into any of the APs and ping with 0% packet loss.

We could never fix it and switched over to google appliances. We rarely have over 20 people in the office.