Everyone seems to be loving Jack3d still, let me give you a little insight on a new product called DS Craze. For me personally, it's the best pre-workout I've ever taken. There is no arginine in there for pumps, they use citrulline malate instead. Incredible workouts! The energy, pump, and focus is all there. I typically use 1.5-2 scoops and have amazing workouts. Let me know what you guys think.