It has been astonishing. This training has been a whole lot more then I have expected. Even after we had learned only 10 percent of the material, it was worth everything I payed. My mother is old. She is not walking well. So I am using it on her and she is walking and talking much better. This is so positiv for me. I am amazed of how much I have learned and I would not trade this for anything in the world.