I agree with the post about CA pushing a horse too hard too fast. When I went to his clinic he never did complete the goals he had set for a high strung appendix mare...In fact, she got away from him and he spent most of the next hour trying to catch her....And then decided it would be best to have his apprentice work with her back at the barn.
We've had really good immediate results from some of his stuff, but I've found that with a couple of our horses I needed to go back and show them that it was okay to do some of the same exercises WALKING, paying attention to toning down the energy put in to the requests.
Whereas my warmblood colt I started doing a lot of the same things concentrating on moving one foot at a time, and now he can do all of it FAST. But there was never any need to push very hard at all.
All of that being said, if it works for you and your horse DO IT no matter what name brand it is.