I took this tour a couple of years ago (and I'm taking it again in a few weeks). My tour guide was Marion, and she gave us a lot of great information. She had some great stories to tell about her days in a Mickey costume. Going to the utilidors was really interesting. It was neat to see the costume shop, and the hair shop. We even saw characters without their heads on. It was interesting seeing the parade storage area, and the water filtration system for Splash Mountain.
The price of the tour is $59 plus tax. I believe that there is a 15% Disney Club discount for it (or at least there was at one point). It includes lunch at the Columbia Harbour House (I believe you can choose from Chicken strips, a club sandwich, soup in a bread bowl, or a salad). When my friend went last year, they took lunch orders before the tour left, and the lunch was ready when they took their break from the tour.
Karen