Product review (2 stars): Very Noisy!!
It's noisy when it's running.  It turns on and off automatically based on your temp setting.  However, when it starts, it makes chirping sound and makes humming noise when running.  It does this all day and it's very annoying.  I would not buy again.  Also I think it consumes lots of energy for it's size.  my electric bill went up by 10 bucks a month.