This product has quickly become a staple in my pre workout supplements. Gets me right to where i need to be with any jitters or tearing my stomach up like many other pre workout supps out there. Be sure to take it about 30-40 before your workout on an empty stomach or after a light meal. This stuff will kick in, you just have to make sure it kicks in at the beginning of your workout. It's almost like someone turns on a switch and you will literally want to eat the weight! Stack with T-Alpha and Mass Addiction Amplified and you will be a BEAST in the weight room and the bed room. Stop wasting your money and start making an IMPAC today.