It does cool one small room. Ran it non stop all Summer. Do need to make sure it is installed with the correct angle or you will have condensation. I only wish the high speed blew a little harder. Not much difference between high and low.
I was very surprised and pleased at how well it works. I live in a small two-story country cabin. This little air conditioner keeps the downstairs very comfortable. I want to buy another one to go upstairs.
This little unit with simple controls has been keeping this small room at a very comfortable temperature since we installed it. Turned it on maximum cool and fan when first installed then reduced fan speed and upped the thermostat. It's been running night and day since installation.