I'm also doing P90X right now. First, let me begin by saying that Tony Horton is a douche that gets on my nerves. Osti qu'chu tanné de l'entendre avec sa shakeology pis son esti de beachbody.com. UGH.
OK, now I feel better.
The workouts are fun and I realized I'm in much better shape than I thought, at least cardio-wise. Because of my schedule, I do not do a "pure" P90X; I sometimes need to skip a day of training, but the following day I work out, I'll do the exercise I was supposed to, no cheating involved. For example, I went to Cape Cod for a week, and there was no way I could work out as we were camping. But I tried my best to eat well (don't get me started on the food).
So far, I completed 2 full weeks of work out (over a month, I started on July 19th, blame it on the vacations) and already lost 10 pounds, from 208 down to 198 (I'm 6' tall). However, I'm crazy on the diet; eating a TON of proteins (eggs white, chicken, turkey), energy bars once a day, lots of veggies, cottage cheese & 0% yogurt, can't remember my last portion of carbs, protein shake once a day, you get the picture. And I cut down on the booze like crazy, but I still enjoy a glass of wine or two occasionally with the fiancée.
I must also admit I work out HARD, and it's frequent that I'll go for a run after workouts (for example, I can easily go for a 20-min run after Kenpo X). I'm a little crazy, and my GF can't believe it. My goal is to go down to 185 and if I make it to 180, I'll be freakin' happy. Seems like on my way there, the pounds are DROPPING.