I was just thinking this today, how much I love Cardio Leg Blast and how great it would be to have an upper body version of this DVD. I completed the STS series but found it challenging in that I got bored with focusing on a particular body part for an hour without any cardio, although I can clearly see that I've gotten stronger by doing the program. I love doing cardio with weights. I suppose that's called circuit training. It works so well for my hour-glass shape body. I don't like kickboxing so I could do without this in any new DVDs. I'm not a fan of straight step DVDs for the reason above, although Cathe's Intensity DVD is a favorite of mine which I do with three risers now. The step portion of this DVD really work the legs while providing a challenging cardio piece to it. In order for me to keep up my strength gained from the STS program, I now do one of Cathe's total body DVDs three times a week and doing a cardio/circuit training DVD the remaining three days. Also, I wish that a separate abs workout would be incorporated in each new workout. Once I'm done with a DVD it's difficult for me to pop in a new DVD just to get my abs done. That's what I love too about the XTrain DVD set. I can hardly wait to see what's next.