Just installed this UPS. Unfortunately blackouts can still happen, even in the best of hardened sites. As a network engineer, blackouts can severely hender your productivity when your responsible for running a moderately large banking institutions data and voice network. Most of the time, our blackouts only last 10 seconds to sometimes 2 minutes. I am hoping this UPS will bridge that gap, and keep my CPU stable until the regular power is restored. Price and features was the key to choosing this UPS out of the many different choices out there. We bought 1 for each of our 7 engineers. Will update again when this UPS hopefully does its job and I don't lose what I am currently working on.