Good god just get mono. Pretty sure there was an article on here couple weeks ago pretty much stated there was no real proof kre had any advantage over mono and in fact wasn't quite as good. Or go with a blend, had good results with muscle pharm creatine its great price, concrete alone is still to expensive IMO, muscletech just released their hcl creatine, I'm actually interested in a muscletech product... Never thought I'd say that