Bought this for both seasons, cooling and heating. It is spot on and works great. My room is approximately 350 sq ft and takes care of it without issue.
We just got this for our Lanai. So far so good. Installation was easy. It cooled the Lanai from 90° to 78° in about an hour. The noise level when the compressor is running is about the same as a hotel room A/C. Once it cools down it is very quiet.