I got these because I was so impressed with Power Circuit (VHS)...it's short but it really works you and it even has an ABS section. I remember doing LL (VHS from a SWAP)and sputtering when she mentioned that there was an abs section after she tried to kill me. So the set is mine now! I tried ALL STEP and that was fun and last night Step and Intervals plus the Step portion of 10-10-10. I have step tapes that could go for an hour and not make you feel like these!