Had to buy new ac due to my 15yr old ac finally giving out in the middle of heatwave!My order came just as they stated it would, left it off for 24 hours, then proceeded to put the ac on the window as the instructions indicated. Although it has small gaps which I covered, so far the ac is working great! I actually have to get up in middle of the night to shut it off!  Waiting for next heatwave to come so I can see how this ac handles it. Overall am happy with this purchase