My husband and I very recently purchased this workout program. I don’t think most of you have mentioned how old you are but my husband is 50 and I’m 47 and this workout is definitely pushing us. We haven’t quite started doing it religiously yet because we’re both still struggling to follow along and we’re also getting our work-out room set up so we’ll have everything we need at hand. Neither of us are crazy about the bands so we’re using a small set of barbells and have dusted off the Bowflex.
So far, we’ve done the chest and back, ab ripper, plyometrics, shoulders and arms, yoga and the stretch work outs. We plan on taking our pictures and our measurements tomorrow as well as setting up the logs to keep track of our progress.
My initial impression is a positive one. I used to be very athletic and active but after a significant knee injury in my 20s while playing soccer, my general laziness and poor eating habits caused my weight to creep up over the years. I recently lost 60 pounds with the assistance of a doctor monitored weight loss program but I know that in order for me to continue to be successful, I have to make changes in my habits and attitude. Period. My being fat was my own fault and I don’t want to gain the weight back. I’m fortunate in that I don’t have a lot of excess skin to worry about even though I was borderline obese. I am, however, flabby and that’s what I’m wanting to tone up.
My husband, while never having been overweight, has had some heart issues, including having a stent put in when he was 48 and he went through an ablation last year. His cardiologist has cleared him for exercise and this is the first time he’s shown ANY enthusiasm at all for working out. That has helped keep me motivated.
I’ve done the X Stretch work out only a handful of times now (due to other health issues, there are some days when I know I’m not going to be able to do the more difficult work outs so rather than skipping exercise entirely, I pop in the X Stretch work out) and I can already see a significant improvement in my flexibility. My husband is having a very difficult time with that as well as the Yoga but we push ourselves through it, knowing we’ll improve in time.
The Yoga X kicked both our butts! Oh, and the plyometrics, too. 
We use the Bowflex to take the place of the pull ups because neither of us can do those right now at all so we just pause the DVD, do some chest pull-downs on the Bowflex then go back to the DVD. Yeah, we’re pretty wimpy!
I enjoy Tony’s attitude, his sense of humor and I appreciate that alternate methods are demonstrated for those of us who are out of shape. We find P90X challenging and enjoyable at the same time and the variation in what we do from day to day really helps a great deal.
Man, this place is going to be up to our eyeballs in hotties after 90 days! 
There are some tough pushup combos in Month 2! But I take the fact that I can’t do as much to mean that I will be getting better like Month 1, because I have that experience of improving in the first month, I won’t be as discouraged. I’m actually excited to do more pushups (though ask me again while I’m in the middle of a set and my answer will change).