Summary: I've had this running for over 7 years almost non-stop to cool a small computer room. It is still working and does it's job very well. People who complain about it not cooling just have no clue on the proper use of a portable air conditioner. As far as noise complaints that I have also seen about this unit, the noise level is about average as compared to others portable AC units that I have used. You can get much quieter ones, but they are significantly more expensive.
Summary: Do not buy this AC,,it does not keep any room big or small, cool or cold.It is very over priced.I tryed four kinds,this one has the most BTU but high price,it was very loud.All the other brands, did a very good job of keeping,not only one room cold,NOT COOL,but my hold one bedroom apartment as well.BUT this unit did not keep one room cool,so cold was out of the question.Do not buy this unit.And I got it new,right out of the box.It doesnoting but made alot of noise.
Summary: It is extremely noisey even on the low setting, but worse is that it does not even cool. IT didn't seem to cool at all so I let it run all night in an attempt to cool down a small room, the next morning the room was 1 degree cooler than the other rooms. A fan would do similar work and have less noise and cost.