Pros: This is a good compact UPS which we selected because it has a menu and buttons to turn off the on-battery audio alarm, without having to install nasty software (like APC). We use it for protecting Sonos audio equipment, in a small meditation room that needs to be very silent, even during thunder storms and other situations where the lights go on and off.

Cons: The UPS seems perfectly quiet when on line, but makes a buzz when on battery. This is not perfect but acceptable. At least there is not additional noise from a fan (large UPSes have a fan to cool the battery when using battery power).

Pros: This replaced a cheaper power supply that failed after two years. The EarthWatts was easy to install, had nice long leads, and was significantly more quiet than the old one. I reused the old power cord, and it actually fit the new power supply much better than the old. Exactly what I needed, worth the extra $$ compared to the really cheap ones.

Cons: none