I read a study, but forget the address or I'd post it, that said EAS outperformed other tested brand by a long shot. I have a friend with a Pharm D that tells me 100% creatine is 100% creatine, but I think EAS makes a superior product. The study also showed the effects were multiplied when taken with certain sugars, and rated phosphagen HP the best product out there. From my experience, EAS products are slightly more expensive but worth the money every time.