I've read quite a few threads about people looking for a stim-free preworkout product and I have to say that this stuff hasn't disappointed me at all so far. I know a lot of people don't trust Dymatize (Protein especially) but I love this product. Solid doses of key ingredients you want in a preworkout (Creatine, BA, Agmatine, BCAAs, etc) and very affordable. You can find it for buy one get one free right now if you google search. Also taste is very good. 2 scoops alphamine+2 scoops of this = a great workout for me.