I have had this unit a month.  It arrived on the day I was told it would and in good condition.  The air conditioner was nearly ready to use right out of the box.  It took me about 10 - 15 minutes to set up the hose and the housing for the window, attach it to the machine and that was it.  It has a lower profile than my last portable a/c unit and does not require a tank for water which is a huge bonus.  This air conditioner is relatively quiet, very easy to move on wheels and cools a large room area within minutes.  Once the main room (20 by 15) is cooled, I then open the doors to four adjoining rooms and within 30 minutes everywhere is cooled. Seems very powerful - I haven't gotten my electric bill yet so don't know how much energy it uses.  However, based on what I do know, I would highly recommend it. It does what you expect and maybe a bit more.