Step Jam was my introduction to Cathe--soon I was hooked and buying everything else. It took me two days to learn the choreography well enough to feel like I could follow along and a few more days to look coordinated while doing it. To me, the choreography and intensity levels are comparable to Step Fit and a bit below Step Works. When I first got Step Jam I didn't have a whole lot of step videos and I used it so often that I got a bit tired of it. But now that I have many to choose from, whenever I do this one I think "oh, I forgot how much fun that was!" I'll admit that I don't like the cool-down, I prefer the more complex dancey ones Cathe does in later videos. Small price to pay for an otherwise great video. And since I recently had to deal with a knee problem (6 weeks of being only able to do stationary bike for cardio), I'll put in a plug for Step Jam as being the first step tape I went back to because it seemed to me to be pretty easy to modify to the impact level I wanted--I'll do some impact on the step because it "gives", but I'm still mostly avoiding impact on the floor. Hope this helps. --Karen