I have Treadmoves sports and cond. I like it, and it is tough (not as tough as the runervals though). The blonde girl in it is annoying(chatty) to me, but might not be to others. The weights are 2 pounds and kind of a waste to me. I know I could go heavier, but I feel uncomfortable on the treadmill when I do. I have 2 of the runnervals. #1 and #2. I pesonally like them alot better. Maybe because there are no weights, as there is in the Treadmoves that I have. #1 of the runervals is harder than Treadmoves sports and cond. I just thought I'd tell you just in case you thought it would be to easy-LOL!! The #2 runnervals is VERY tough. I have to modify all the way through. I'm not getting #3 until I can do #2 and that may be never. It has you running at 5 mph over your comfort/base pace at times! Very, very tough. To me they are as tough or tougher than any Cathe cardio. I have all of these on DVD and they are all chaptered and you can skip segments for them to fit your own workout if you like.