I tried TurboFire with my roommates this past summer - I actually LOVED it! It was unlike any other workout I'd tried before. Unfortunately while running I hurt my knee and had to take some time out from doing it; I'm hoping to start back up soon.
I have no doubt that if you follow the workout schedule you'll get results. Sometimes I would pair the cardio with some weight training of my own because I felt that there was not enough strength training (even though many of the moves during the HIIT portion required strength). I, however, made up my own diet and did not follow all of the suggestions that are given on the meal plan. If you decide to follow the meal plan or actually purchase any of the ********** products that are so highly advertised through Beach Body, please let me know if you like them! I really wanted to get them, but I felt they were just too expensive and that I could purchase my own protein powder.
Make sure to have LOTS of water handy, and to do lots of jumping

It beats the elliptical for a half hour, that's for sure.