It is very intense.
I love the weight work in this!: short, to-the-point and effective.
The cardio I'm not as into, because 5 of the 6 workouts have high impact and 4 workouts have step. 4 high-impact step days a week are too much for me, but even with modifications (turning some high impact to low), I found this rotation impossible to take beyond 2 1/2 weeks because it bothered my knees (which hadn't bothered me for a while! Maybe I needed to change MORE of the moves to low impact).
I think the concept is an A+ idea, but the execution (to much of the same type of cardio and too much impacct for intensity) is flawed.