interesting that you didn't gain weight.
see, the thing is, when people say "this workout/supplement/product sucks, I gained no weight yet ate like a horse", I have to ask "how much did you actually eat"?
if you eat supercalorically, you will gain weight, period. You don't need to workout, you don't need to lift weights, you don't need to do anything, but the fact is, if you gain "zero pounds in 8 weeks" or whatever, that means you ate to supplement your metabolic rate only, and did not eat enough.
I'm not saying you didn't eat a lot of food, what I'm saying is that, purely by the numbers, you did not eat enough. Perhaps the PP had an affect of increasing your metabolic rate? Did you notice an increase in strength?
Not picking on you, just curious. I have 2 bottles of PP now, and will probably pick up a 3rd to make sure I am dosing high enough. I haven't used the product, so I'm not trying to "sharpshoot" you or anything, but the fact is that NOTHING will make you gain solid bodyweight unless you eat more calories than you burn.