So I had the opportunity to try Jacked, and it is pretty good stuff. You can really feel the beta-alanine as you get the "tingling" feeling at your fingertips and fore head.
Gives a pretty good boost at two scoops, and I have a pretty high caffiene tolerance.
I belive it only comes in lemon lime. I cant stand the taste of most of these pre workout drinks but this one wasn't bad.
I give it the thumbs up!