I took the 2 day at Hallett Oklahoma and had a riot blast! The school gives you lots of seat time and 2 days gives you time to practice the drills and still have time to drop the hammer and go for it.
After 5 years of club racing I was tapped out but found new speed from the courses. Really the $$ was well spent to get another 3-4 second off my lap times in 1 weekend.
Then there is alot to be said for getting to ride with some of the best teachers and current riders around. I got to ride with Jason, Steve Mikolas (Sportrider Mag), and Danny Eslick. Got pointers from James Lickwar. And met several other industry names...