We went to the one that Todd English held and it was very good! I didn't care for all of the food he made, but it was neat to watch in person and get to try everything. I'm definitely looking forward to going again this year. If you search the forum there are several people who wrote up a review of their experience.
They need to work on the serving of the food though. He made an ice cream float type thing for dessert and by the time we received ours the ice cream was completely melted.