The quietest AC I have ever owned and keeps our room so cool! I purchased it because I have a smaller window - I removed the bottom half of the window so that we could install this one, and with the ac sitting over the window sill, I was able to reattach the window! Great option if your window doesn’t open as wide. I only had the option of using a very small air conditioner before so this is a very innovative option! Love it, I would get another.