I believe that class is full.
As for taking a class, I took one the first year I started and learned a lot. I thought it was worthwhile. I actually cooked against the teacher at a contest the following year and beat him with his own technique - he was second. However, you need to decide how much of what they teach you might use and does your cooker match that style. For example, they could tell you they cook at 300, or higher. They may cook on an offset and you have a vertical gravity fed or pellet cooker. The techniques can be useful in any situation and may prove worth the $500 (or more).