I did this one yesterday, just the main workout. I would class myself at an intermediate level and this workout was just right for me. Most of Cathe's more advanced workouts I have to modify a lot and pause the DVD several times to catch my breath. This one I didn't have to modify or pause but still got a good sweat and my heart rate up. It can easily be made more advanced by adding in the Calorie Crush, using weighted gloves, going deeper in the squat and lunge moves etc. There are also moves that can be modified to make it a bit easier for people who are more beginner level or coming back from injury. So in my opinion as an intermediate workout Cathe and the team have got this just right.