The videos are really useful and helpful to understand what should be done with regard to rehabilitation of an injury, or for general overall good health. There is no way you can go wrong using this program! As mentioned above, if there was a downside it would have been in terms of difficulty at picking which one to use. If you choose your exercise wisely, you will see positive results right away, so there is not much to dislike here. I am currently working through many different programs to help improve my flexibility and strength. This one has helped me with both areas, as well as helping increase range of motion while I'm doing other physical therapy treatments I receive elsewhere.