This is an intense workout, but in some ways it's so easy to follow that I actually find myself enjoying it. The first 2-3 times I tried it, I found myself overwhelmed, but I quickly became able to do it. The only parts I skip are the jumping jacks, as they are too hard on my knees. I also modify my lunges so that they aren't so deep, again because I want to protect my knees.
I can't say enough about this tape and I think Susan Harris is an excellent instructor. I have tried some of the more recent firm tapes. They were all compilations of various instructors and I found them choppy and nerve-wracking. This tape has a definite flow to it. The camera work is pretty good, too. I have tried tapes where the camera man would just focus on the instructor's face when she begins a new routine, so you can't even see watch she is doing. This tape is easy to follow.