I bought Turbo Jam about a year ago ... but didn't use it right away. And then I learned that the DVD's are a little damaged and "skip" and/or "get stuck" on all of the programs except for the "learn and burn." But by the time I learned that, it was too late to exchange the DVD's.
I liked the "Learn and Burn" program, but haven't been able to try the others. Somehow, I resist the idea of paying twice for the same program.