Not that everyone isn't finding enjoyment in watching you guys squirm but you are totally psyching yourselves out. Steve White is a great guy with a very positive and encouraging teaching style. He is not going to rip you to shreds and make you run around Seacrest 5 time with your underwear around your heads for doing something stupid. He will show you the what and why's of DIR. He will look over your gear and make suggestions on what to change and why. He will teach you techniques and skills you can practice to become a better buddy and a better diver. To your amazement, you will come to find that these drills that were once perceived as a lot of work, are actually fun and will probably bring more enjoyment and comfort to your diving.
For those of you with MHK, I have heard nothing but accolades but I do not know him personally. He may have as special underwater dunce cap and post your videos on this board for public scrutiny, I dunno.
Think about what you want to get out of the class. Write down all of the questions running through your heads right now. Once you are in class, they will ask you if you have any questions and everyone will look at each other and say, "uhhh...nope." Think of them as the math teacher that finally got you to understand algebra. Not the dean, waiting with the paddle.