This window AC unit really exceeded my expectations. First its noise level is very low, which is something important for a good night rest sleep. It cools the room fast. The saving energy mode is working fantastic; just keeping the unit on when necessary. Last, the wifi setting really helps me out to control my room temperature; when I leave my room in the morning I set up temp at 78 degrees, then, about an hour before returning home, I just set up to 70 degrees using my smartphone. One important note to keep in mind that wifi set up is easy if you just take the time to work it out. This is an absolute purchase that I am and I will be so happy for so long. Definitely, buy this AC window.