It's quieter than I thought. Really easy to set up, does a great job of cooling my bedroom. I love the extra features on it, like the time on timer, time off timer, follow-me setting, and the night time setting. It's a little big, but exactly the size as indicated and came right on time. Just be aware, it takes a lot of electricity to use, so your bill will probably increase. However, that's true of all air conditioners, not just this one.