My AC system doesn't supply enough air to my rear bedroom so I decided to supplement the cooling with this portable system.  I used it for the first time last night and I was very impressed.  The product performs as advertised.  I kept the fan speed on LO so it wouldn't keep me awake and I slept very well.  It still somewhat early to make a final conclusion, but I think the product is a winner and deserves the high ratings it has compared with the competition.