Haven't used it enough to tell how effective it is. So far it gives an added boost and seems to keep my leg muscles from cramping after working out.
It makes my loins swell, producing massive amounts of chi in the man root. 9 ropers for days.
No jitters and I don't feel like I'm going to drop into vfib every time I do cardio. Tastes a little chalky but I'm not sipping it on the porch.
I love this stuff. It doesn't make me feel like I'm cracked out like most other preworkouts and the servings for dollar are a good value. But two minor cons are: it doesn't mix very well and it doesn't taste very good. Not huge problems but the fact that it doesn't mix well is pretty annoying. But I'm gonna continue to buy this stuff due to it's great performance.