I got this a bit over a month ago and my only complaints are that you have to turn the useless eco mode off everytime you turn the unit on, it occasionally develops a bit of a rattle, and it has developed a mild mildew smell even though I installed it at a slight angle as shown in the instructions.  Also, the "feet" that drop into your window frame are way too wide and I had to really force it into my vinyl window frame after crushing the metal "feet" with a large adjustable pliers, which was not easy.  That being said, it cools down my room very quickly.  I just run it on cool mode and low fan when I need to cool off. [This review was collected as part of a promotion.]