I am extremely happy with this unit. It has more features than I expected. I like the eco mode which keeps the rooms at a comfortable temperature. It isn’t quiet, but not as noisy as previous unit I had.The only reason I didn’t give it 5 stars was that I had to use a bit of insulation foam under and around extending louvers. But I have 30 year old vinyl replacement windows, with a higher ledge.Easy to install!