I've had the Calif Air 10020 for about 18 months, so that's not long enough for a reliable review. It is quiet. I like the design layout – functional, portable, easy to use, good dials. It arrived with some shipping damage that had dislodged some of the tubing. No cosmetic damage, but it's just an AC right? Packaging was inadequate. One phone call and they quickly shipped replacement parts; easy fix. So far: good purchase!