Bought for an exceedingly hot upstairs bedroom when overnight guests were expected. It did the job quite nicely. The room is 10x15 and it cooled down significantly in a few hours.The guests noted that it was fairly quiet and more like white noise than annoying. It was easy to set up and easy to regulate. The window install was easy enough but some sort of insulating rubber foam strips would be welcome to better seal the outside vent. The unit does move, but is heavy so I find moving it on thick carpet takes a little effort. Overall I am glad we bought it.