Having previously installed two different air conditioners in the windows of our house, we decided to cool a very hot upstairs of a detached cottage with the Frigidaire. having struggled with the first two installations, we were really relieved and pleased with how quick and easy installing the Frigidaire turned out to be, not because we had gotten good at installing from the first two struggles but because the design and instructions made it so easy that my wife keeps saying we wish we'd started with the Frigidaire. and that it cools our hot cottage upstairs so quickly that it doesn't have to be started long in advance of occupancy. We are obviously giving this a/c the highest recommendation with one small caveat: it is a bit noisier than the other 2 we installed though its blower is more powerful thus giving it greater cooling power.