I bought 8300 btu unit. I wanted the 12200 btu unit but it would have taken over a month to get it. I got the 8300 in 4 days. I was surprised how well this unit preforms and most surprising was how quiet it runs. You have to double check it’s turned on, it is so silent. Also install took me about 40 minutes by my self. I’ve had ever other kind of Air conditioner in the past. Traditional window units ,rollaround units. By far, this is the best unit on the market. Installation is a breeze, and also the unit puts no stress on your window or its frame unlike traditional units. Rollaround units are way more expensive and are loud and don’t cool the space down well at all because it’s like having a space heater in your house that’s blowing out cold air, counterproductive. This unit puts the hot elements outside and the cold elements inside which makes it super efficient quiet and worth every penny. I plan on getting the 12,200 unit sometime before next summer when it’s more readily available,the only note I would give to GE electric is please develop something similar to this for a casing windows , side closing windows.