I saw him years ago and felt it was done as a magician act, all about how good it was and without the actual means to work out how to apply it for yourself.
Then I saw the video last year (or the year before) where a horse threw the rider 3 times. It was plainly obvious that the horse was not ready to be ridden, it had frozen and was tight and not relaxed at all. I believe he even swore when the rider fell the second time and got their foot caught and was dragged. No matter, throw her back on!
After seeing that poor horse (and rider) I would not go back and watch again.
I love watching the Mark Rashid demos, and have had two horses as demo horses there too, where riding I felt he really looked after our best interests. Plus gone to America to ride with him (and do Aikido) on 4 occasions. Highly recommend.
Loved Richard Maxwell too, went to some early ones, then went to a more recent one where I hoped to glimpse something to rekindle my daring do days - only to find he has become more cautious with age just like me. So, I gained something, just not what I thought!
Buck Brannaman - yes I think the man is a genius. However I did not think the crowded area of riders was a good conduit for teaching.
I also live very close to Guy Robertson, had a great week on a horsemanship course last year where we ended up doing cow work.