re: P90X-3/T-25/Insanity in-game thread

I'm on week 12 of p90x right now. I'll be out of town most of next week so I probably won't do anything and just use that for rest, then the following week I'm starting x3. I bought the discs from some lady on craigslist, but I don't really know what to expect.

Can anyone give me a hint of what I'm in for? I love that the workouts are shorter since I work out first thing in the morning. Overall is it more intense? Is it a good mixup of exercises or is there a lot of carryover from p90x? Also, I don't really do the exact p90x schedule, I typically don't do the "lesser" workouts like kenpo, stretch, yoga. I do the resistance days on M/W/F, usually throw in core synergistics on either Tu or Thr, then either do treadmill or rest the other days. Are there any discs on x3 that are similar that I (personally, according to what I said above) would probably skip?