Thought I might be pushing its limits for BTU's vs. room size. Am w/in its recommended sq.ft. but have vaulted ceiling. I Run a ceiling fan and have no problem cooling the area down. Even to the point of being asked if could turn the AC off. Would and should probably give 5 star but only got it a few weeks ago so hard to tell how its going to hold up, but has worked great in our recent 
heat wave.