We bought the Heir QHNG10AA ac for our living room window and it works great.  The room is about 450 Sq Ft and it cools it down nicely, ecspecially since it's been 85-90 degrees for the past 3 weeks.  I leave it on ECO mode and set the temp between 70 and 75 degrees & it cools the room very nicely. The only Con we have is that it's slightly noisy so we just have to increase the TV volume when watching a movie or show.  Other than that, we love this ac.