I have an APC 1500 for my home network and Unity Intercom server. The wall box for my FIOS service has a built in UPS. Twice since I have moved here, the FIOS network has told me over the TV screen to click OK to replace the 12v battery... a few days later a new battery shows up and I installed it in the wall box and shipped the old one back.
At least once a month there is a short interruption in power and everything hums along (had one at 9 am today!) Last year The power company shut off service for repairs and 4 hours later restored it. Since my ups is only loaded to 19% it lasted the entire time. Worth every penny since I was out of town. I get text notices when power is off.
On shows I always use ups, mostly Triplet, for equipment which has a long boot time. Riedel, Freespeak, Helixnet, and every intercom panel on the show. Several times in my carrier having UPS on the comm system has been fortuitous. At least the SM can still talk...
Here's a shot of my FIOS fiber box and the server rack.