we purchased two 8000 and one 12000 BTU air conditioners and they are ok.  I expected them to cool better and be more powerful.  the ancient ones they replaced were much colder and we didn't have to set the temps so low.   no doubt this is big brother's doing not the manufacturer.  the are considerably smaller than older models which looks nicer in the window but I guess we gave up cooling for newness and style.  not sure I would buy them again.