It's the first humidifier I have that will humidify my whole apartment and that on the low setting. It's pretty quiet too. (about 900 sq ft) Output Volume Very good, keep humidity at the level I want. Performance Very good. Ease of Cleaning I soak the filter in cold water once a week and clean the tub and tank with vinegar and water OR javex. Never use both together. Durability The only negative thing is the spring that holds the cap has rusted and is now gone. So now, it's a bit difficult to place the container on the humidifier without spilling a bit of water. I have to hold the cap down. Design I like this design, it fits nicely in my hall. The rusted spring should of been made in a none rusting material or better even, but the refill hole on top of the tank, not under.