I bought this about 2 weeks ago to replace a 20+ year old unit that was just plain tired. When I initially turned it on it took probably 5 min till the compressor kicked in, I was worried that I'd gotten a defective unit. After it did finally turn on it got really cold, the unit is extremely quiet to the point where if you don't know it's turned on because the display turns off automatically after 30s you have to put your hand in front the vent to feel the air coming out! It has WiFi control but that's not something that made me purchase this unit, I wanted a quiet unit and certainly got that! So far I'm very happy with my purchase so time will tell how reliable it is.