Along with what you've been told about 100% Creatine Monohydrate, you want to look for micronized Creapure creatine.
I personally buy Optimum Nutrition.
"The fastest way to get strong muscles is also the fastest way to make them bigger. We know what works best to make them strong in the shortest time possible. If you want to get big, do the thing that makes them strong." - Marc Rippetoe
Zdravko Veselin Gaeta
I am not a powerlifter nor am I a bodybuilder. I just want to be big and strong.