As the others have said it's a great program. Just be careful when starting out. Some of the routines sneak up on you. I made the mistake of doing the chest arms program and Ab-ripper in one day the first time. The whole thing. I felt fine when finished. The next morning I couldn't get out of bed or move my arms. I was paralyzed by pain for two days and couldn't brush my teeth for a week. I shelved the whole program for a year after that.
A few months back I started mixing P90X in with my triathlon training program which is swimming, biking and running. I started slow this time. It's been great.
Good luck with your conditioning.
