I bought this as a temp fix in Texas since one of my main house A/C's went down for repairs.  I use it to cool a 11x14 bedroom.  Set up was simple and straightforward.   Right out of the box it cooled down the bedroom several degrees within 30 minutes (cool setting).  Been using it every day now for the past two weeks and there have been no issues.  I only briefly checked the other two modes to make sure they worked.  It is loud (as other reviews have indicated), but I prefer some noise at night anyways so it is not an issue.  I like the mobility of this unit and even tried it in another room briefly.  Moving it was no problem.  I would like to see the option of buying an extra window kit automatically offered when purchasing this unit.