The Myron Mixon class should be very informative and a fun getaway. He definately has championship credentials.
Most all the different classes are taught by folks that have won in different styles of contests. They won't teach anything that the crew here (or any other forum) points out and reccomends, but the chance to spend some quality time with a group of other serious and not so serious cookers and maybe learn a thing or two can't be all bad, if you have the time and money for that type of experience.
Big Tom Pigs-R-Us cooking team