I have to admit I was a bit apprehensive when my husband pulled this air conditioning unit out of our landlords shed. I wasn't too keen on having the window open all the time, and was even less keen on the idea of having to endure large amounts of noise in order to stay cool. Nonetheless I let him install it and I couldn't be more pleased with the results! We used it throughout the duration of the summer, and it worked so well we will be installing it this year as well. The noise it made was minimal compared to some of the other units we had seen, even though many people complain of it being loud. And the best part was we didn't have to have it on for very long at all because it seemed to cool our house through very quickly. We would turn it on for half our sprints at a time, and then be able to turn it back off again because it had already done its job. As I am planning on using this unit again I would definitely recommend it to someone.