I've just completed my second week of P90X. I find the Plyometrics fun and a good workout. Kenpo is fun, but I don't get my heart rate up as much as I try. Tony and kids are sweating like crazy. I feel like Cathe has really raised my level of cardio fitness and this isn't doing it for me. I was curious for those who have done P90X, have you found this as well? Is the Cardio DVD in Phase 2 more challenging?