Really nice setup.  Instructions for putting on the hammock portion are not clear at all.  The perch above the "condo" portion is the same dimensions as the level below it, making it difficult for the cats to easily jump up to it.  It's in my bedroom, near my bed and in front of a window, so they just use my bed as a launching pad.  A little design change there would be helpful.  Fix those 2 things and you can have a 5 star rating.