I have done P90 Masterseries, P90 Power half hour (very good), P90x, and Turbo Jam.

The MOST fun was Turbo Jam. It was easy on my knees, and it makes cardio fun for me.

The P90 Power half hour is very good as well. Its not hard on the knees and not nearly as intense as the other series.
Originally Posted by CurlyHairedFarmer
Did you get semi the same results are the regular p90. I world really love to gain muscle mass and moderate to High definition and looking to find something that will cruelly work