While this workout might be effective if you did it, the lack of commentary renders it nearly impossible to follow.
The video starts with an intro where Tracy talks bout the motivation behind it and then simply jumps into the workout, no warning.The first time through, I thought it was part of the intro but about 15 seconds into it realized it wasn't just a bridge between the intro and the start of the workout, the workout had begun. What follows is the warm up coupled with music. no commentary or instruction is included. I got through about 5 minutes before I got so frustrated I turned it off. I was constantly a few steps behind and spent more energy trying to figure out what I was doing than actually doing it. The best part is when she starts doing moves that are impossible to do while watching television(i.e. bent over head down) still without commentary. But if you don't watch you'd spend the whole 30 minutes doing that move as she never tells you want to do next. If you have the patience(and time) to watch the video all the way through a few times and memorize all the moves in advance, it's probably a pretty good workout. if not, pick a different workout.