I like the concept of this shoe rack, in that it is easy to see all of your shoes, and they are at your fingertips rather than on the floor of my closet in a heap.  However there are several draw-backs:  Without securing the rack to the door throughout the length of the rack, it tends to pull away from the door and shoes slip down behind it.  It also hinders the door from closing flush as all over-the-door pieces tend to do.  It's the best I have to use for now, and I will try to improve on it by adding fasteners to the door throughout the length of the rack all the way to the bottom.