Insanity Results?

My friend is doing this Insanity workout. I'm not much into DVD at home workouts, but it was pretty intense, my heart rate made it to 185 from the Plyo workout. I would like to know if anyone has had results and if so how hard was it to go the full 60 days? In addition, for those in the military, did this help, hurt, or do anything to change your APFT Score?