Will patially depend upon you and your attitude going in. Then, it will patially depend upon the instructor.
From a Fabricator's viewpoint, I learned a lot about the code that I had not an idea of before the seminar. One of the best weeks of my career. I wish I had done it years ago. I highly recommend it to even my competition in our community in AZ. I have told most of them to either go themselves or send a key employee. Even if they don't take or pass the exam the seminar is worth the time and money.
Good luck. Do some studying ahead of time. Glance through A2.4, 3.0. Read through a WIT book if you can get one. And at least get on overview of D1.1. I know you will get most of these at the seminar but if your office/employer has them on the shelf look them over before you get there. It will ease the study/cramming time during that week.
Have a Great Day, Brent