I bought this for my small bedroom and it works great. The accordion paneling on the side didn't quite fit my window, which was surprising because my window doesn't seem that big, but just make sure you measure your window to make sure it fits. Light noise, but it definitely keeps my bedroom cold. I have a 900sqft apartment and if I open the door, it cools the living room a little bit, but not a lot. Definitely not for a larger room.