I haven't done Insanity. (Will be starting in in 3 weeks.) But I'm on the second round of P90X. What can I say other than it has been brutal! But effective! I can tell such a HUGE difference in where I am now vs where I started off. I can do a few unassisted pull ups now, run over a mile non stop and do REAL military style push ups! I feel 100x better. Lost a ton of weight (over 100 lbs total now!) hit a plateau and needed something to help me step it up and keep going.
I'm excited about doing Insanity next, but a bit intimidated.
