Well, I've been using this supplement since it launched, and I love it. For me, it doesn't hit as hard as the Epi-Test at the beginning of my training session, so I use a Pre-Workout, but in the middle it comes on like a freight train, and keeps going. I personally am able to prolonge my workouts, and push through that fatigue wall, up to 20-30 minutes. Which,results into gain beyond belief. Now, I'm almost done with my first bottle, and I will definitely, be getting a second round before I take...