Have you ever tried p90x?

im on day 3! i dont need to lose any weight at all, i am already pretty skinny but would like to tone up, also, i believe fitness and exercise are important, that being said, if you have tried p90x or know someone how has, what was your experience? did it work for you? i dont want want to get bulky or have too much muscle, just want to achieve perfect tone and maybe a nice 6 pack ;) do you think this exercise regimen is good for achieving that? thannnnnks dudes