We absolutely love this AC. We got the 10k unit and find it cools sufficiently better than our previous 10k unit. It's also so much quieter, to the point that we don't even know it's on. It fit perfectly in our window, and we had no problem with the installation. Our only complaint, if it could even be called that, is that there isn't a Celsius setting for those of us who didn't grow up in the States.