WOW--I Just READ about this, but you've ridden in one!!! Did you post about it?--LOVE to hear what you've learned. =D
I don't mind talking about them though! (been fortunate enough to attend a few) GM is a FAAAABULOUS instructor. He's very very strict and has very high expectations. You'd better be 110% listening to every thing he says and make every effort to improve. You don't have to be the best in the class, as long as you improve. He is harshest on those who make the same mistakes over and over. But at the same time he is quite complimentary when you do a good job. He also expects you to be absolutely meticulous. I cleaned my tack before and after every ride, even polished bits and buckles before and after as well! What I love best is that he doesn't do gimmicks, he doesn't do shortcuts, what he teaches honestly is not revolutionary riding and nothing he said was completely earth shattering. It's good, basic, horsemanship based on solid foundations. He does expect every person to use a spur/crop on every horse and the proper bit as well (which often is not a snaffle). He does quite a bit of flatwork and the jumping is usually a series of gymnastics and difficult turns which get more complicated through the days. I rode a really green horse one year and he improved leaps and bounds just by the end of the clinic. It was fantastic! My friend rode her 4"6 ft jumper and he got on her horse! Her horse is beautifully schooled, and she could tell was even more rideable when he got off. If you ever get the opportunity to ride or audit one of his clinics, I highly recommend it. This past one he mentioned that this is his last year cheffing the US team and he's going to pretty much do clinics year round. We're trying to get him to come do a clinic at our barn! That would be amaaazing....