P90x

[forgop]

Just like with anything, the results you see in the mirror are directly related to what goes into your mouth and what effort you put into the gym. The diet they provide is just a guide and no better/worse than anything else out there. Right now, I'm doing weight watchers because I can track everything online and with my iPhone application, plus I like the plan. It'll "reward" you with more food if your diet is more focused in fruit/vegetables.

I have P90X and never really got that into it, primarily because I didn't have the dumbbells. Bands are doable, but I'm the type that likes to see tangible results in numbers, and that's something you can't really do with bands. Sure, you can choose which color, but it's really hard to track how much tension you have on them. It's certainly an intense program and not for the type afraid to get after it. For those really out of shape, I recommend getting into shape a bit before trying it.