Here is a little info on non-buffered creatines. By the time it gets to your small intestine, you have about 80%-creatinine (the toxic form of creatine) and 20%-actual usable creatine. By buffering the creatine (Kre-Alkalyn), this is actually the buffered form of creatine, it is allowing the breakdown to not happen as readily and you are getting a better % of usable creatine to the toxic creatinine.
Fast-Twitch has the Kre-Alkalyn in it, and i have tried it and highly reccommend it. (if you really want to use creatine.) Make sure you get the caffeine free kind, you dont wanna counteract any of the cGMP processes from the L-Arginine.