It's quiet and keeps my 12x12 room a constant temperature based on my external thermometer. Easy install and comes with everything to stick in a slide up window and seal it up. My 2 complaints are when it shows the room temp it's usually off for some reason and the remote doesn't have dedicated cool, energy saver, fan only buttons just a mode button and a tiny light on the unit that moves so unless you're looking close at the light you don't know what mode you're in. Also, all the lights time out after a few seconds with no option to change that. I'd like to just look over and see the display without having to hit a button to activate the display.