I spent some time yesterday with Andy, doing what is approximately his first day of a two-day camp.
So first, thanks Pgran for starting this thread! And second, I'd like to point out that while this thread is in the 'Beginners' section, Andy's clinic will help riders of all abilities. I came into the clinic having many years of racing WORS comp under my belt (where I've always thought my fitness holds me back more than my technical ability), and I feel like I learned a ton of technique.
Some of the topics covered, such as body position, felt awkward, and will take some time to adopt and utilize. I could at least understand the 'why' behind them, though, as Andy gave great explanations. However, there were some techniques covered where I instantly felt the benefit (and was instantly was happy I took the class). It was a true 'WOW!' moment as I rolled down the trail.
He mentioned he'd be back to Madison at some point, so I'd definitely recommend his clinic.