Don't go with Cellmass, As a old employee of BSN I can honestly tell you that this creatine is not a fifth as powerfull as it claims to be. I am not bias at all, but if you want a good "name brand" creatine, I would say that Gaspari's "Size On" or MHP's new "Dark Matter" are probably some of the best post workout! Although I don't care for it, Cellteh Hardcore seem to a pretty descent product. These all have gylcogen replenshing additives along with a legitament make up of quality creatines. It Seems like a lot of companies are adding an "ester molecule" to every product they make an are now making claims to have the "Most Absorbable" products on the market.