Phil wrote:i've only heard good things said about them.
In that case, allow me to be the voice of dissent... at least where Level 1 is concerned. I did it in October or November, 2000, when I'd been riding just on two years, and two months after I got my R1...
...Level 1 teaches the following:
-look through the corner.
-tip in late, wide and hard.
-keep a positive throttle through a turn.
-use your midsection to support your upper body and put no weight onto the wrists.
With the exception of the tip-in-hard part, I'd already been doing all those things since about I've been riding for six weeks... after all, they teach you all that in n00b sk00l... and I'm about as natural at riding a bike as Neka is at looking presentable.
Couple the fact that I didn't actually learn anything with Brouggy a) packaging everything as a revelation and b) coming out with some outright inaccuracies about bike dynamics, plus the cost of the whole thing, and there are probably better ways to spend one's rider training dollar.
Maybe the higher levels go deeper (Lvl4 has a powersteering drill, from memory), but I dare say listening to jabber in places like this and just plain riding heaps, heaps and heaps is a more economic way to improve one's riding.