Yep we bought one for both the girls rooms cause our upstairs is terrible on a warm day.
Works well for the area, not huge rooms, we put them on about 1-2 hrs before they go to bed (depending on how warm it is) and it cools it nicely.
Never been a problem with the noise.
Only downside with ours is our windows are windout ones which means you can't get a proper seal on the window, they come with window kits but only work on non wind out ones.
Even so we still find the rooms cool well.