Java Man, I agree, the teacher is the unknown.
For me, I had one who was a little nuts. Definately smart, but nuts. He did not want to teach what methods were in the book and taught some of his own instead. Hence why I did not continue with PowerScore. I did not study with Powerscore before, the weekend course was my first encounter with them.
You both sound fine. The weekend course, based on what you've said, doesn't sound like a bad idea, just be wary of the teachers. They are all smart, it's their personalities that you have to be careful of!