I'll give a bump and a good word -- I've taken three of Bill's classes and found them all great!
Sure, you learn the class subject in depth, but you also lots about efficiency and shop practice and craftsmanship. Subtleties that you won't learn from a book or magazine.
Think of it as an upgrade for the most important tool in your shop (you know, that grey stuff between the ears...)
I'm looking forward to taking a planemaking classes, and if I happen to walk away with a plane as well as a bit of knowledge, all the better!
Mike