I've been doing this workout for many years off and on. I purchased this as a replacement for my old DVD that was wearing out. Some may think this workout is too easy, but it is designed to give results without straining the body. If you do the weekly routine twice a week, you will have great results in a short time. I have an old back injury and this workout helps keep me out of pain and tightens my muscles and my core. It is designed to teach you how to integrate the breathing with the exercises while doing the positions correctly. The exercises are done slowly, but provide a great benefit.