I tried Fast Twitch about three years ago at the recommendation of a competing pro in my home state.
It is the most effective supplement I have ever tried.Honestly,it is the closet substitute for AS that I have ever tried.
Unlike most creatine products that give you water weight,I retained the lean muscle gains I got from Fast Twitch.
The only reason I do not still use it is that it gave me bad acne that took quite awhile to get rid of.