I bought this air conditioner for a variety of reasons; I've had 3 Kenmores in the past and all of them lasted at least 15 years each, all have worked great with NO service calls until they finally just wore out (actually the fan motor in all 3 cases) with minimal care on my part (kept the filter clean, oiled the motor every couple of years, removed them from the house and carefully sprayed the dirt and crud out the rear fin area with a garden hose every couple of years), and all were inexpensive compared to other manufacturers. I've seen some reviews that have complained about this unit being flimsy but if you have basic skills and take the time to adjust just a little for a good fit, everything is solid and fits together well. It's as solid as any other brand I've inspected and far less expensive than most. After I installed it in the preexisting opening (I built mine in about 12 years ago rather than having it stuck through a window) I plugged it in, turned it on, and within about 3 hours it had cooled off my entire 1st floor of about 1,200 square feet on a day that was in the mid 80s and very humid. The compressor runs so queitly I can't even hear it, the only noise you hear is a slight hum from the fan and the sound of the air being pushed across the room. It works so well, I'm planning to buy another like it for my 2nd floor, even though that A/C is still working, as it's the same age as the one that just needed replacing and is not an energy star model. I love it!!