The design of this A/C is genius.  The installation took no more than 15 minutes.  It will take 2 people to lift into the window but once it is in, its not going anywhere.  It has a quiet fan speed that you can hardly hear.  It cools the room fairly quickly so it's a win win.  The instruction booklet is fairly easy to understand and I love love love the fact I can see out of my window!!  That is a nice bonus.  It sits very nicely in the window, no worries about it falling out.  I am so glad I purchased this unit.