I think it has value. His main idea (my interpretation of it, anyway) is to learn how and what the torso does to power the swing. Take the arms and hands out of it until you can figure out the main source of power. I made my DD a rebel rack before he offered a x -small (Home Depot) and with a mirror I believe she learned a lot about how to power a swing. What do you think of the extended version? Might help hitters understand tilting into pitch height/location?