I've been using the Teeter Hang Ups Doorway Rack for over a year now and my back has never felt better. The rack requires simple assembly and drilling a few holes in the doorframe, and took me less than an hour to complete on my own. Having help during assembly would have made it even easier. Hanging for 5 - 10 minutes a week with the gravity boots keeps my back pain free and helps me relax. The position of the bars makes it easy to lower yourself slowly and come back up with control. The decompression feels amazing the rack is sturdy enough that I never feel like I'm going to fall. After suffering through years of back pain, I only wish I had made this investment sooner.