Hello,
Even though there are no premixes the DVD is still excellent because there are 3 workouts on one so you can make your own premixes. It has Mix & Match and Chapter options so you can skip to the section you want. I have seen people recommend doing the floor work of MIC and the IMAX blasts only of IMAX1. I did this once as well and it was very good.
I would recommend this DVD because the workouts in themselves, without premixes, are tough. Rhymthmic Step is one of my favourites step workout.
Yen