Go with Metrx's or AST's micronized creatine. They're both pretty good quality. If you do go with Creapure, try to find it in micronized form. Creatine does not dissolve in liquids. And guess what, if you injest it, it still won't dissolve. All it does is sit in your small intestine and pulls in a lot of water. Making dehydrated and gives you the shits. Micronized won't cause any of this. Just take micronized in grape juice. Don't buy formulated creatine. Most of them like CELL TECH are loaded with dextrose and it will give you a gut. It's ok to have creatine with dextrose, but you don't need 80-100 grams per serving.