I attended a couple of years ago. The school is taught at the BW plant by Fred Asbell and Ken Beck. It combines three things:
1. Instinctive archery, primarily taught by Fred Asbell.
2. Bow and arrow tuning, primarily taught by Ken Beck.
3. Touring the facility and trying out any of a large number of BW bows, which are available on racks all during the course, to use during training or on breaks.
In the course of the training, you meet Roger and other BW employees. There was never any pressure to buy anything at BW (not that any of us needed to be convinced).
All the course objectives were met, all the folks were friendly, and all the food was good. What can I say? I've been tempted to go back for another round, just because of the good feelings I have about the experience. However, I think there is a benefit from learning from different teachers, so I will probably try something else. This was a great way to start, though.
If you go to this course, you should be prepared to learn the instinctive method of shooting. Even if you don't agree with everything Fred says, just focus on what he is saying and doing for the time you are there, and put your own personal touches on it later. (I think the same could be said for any method of instruction).