It is powerful enough to cool my 1880 home! At least the entire first floor. 
The unit is compact, not ugly, and fits in my living room window without taking up a lot of space or interfering with use of the room. Two big bonuses are the heating and dehumidifying modes. Great for those chilly fall days when you don't want to turn on the furnace, and for the really humid weather we are having in upstate NY lately.