I received a sample of this and gave it a shot. 2 caps first thing in the a.m (with coffee) and 1 in the mid afternoon. Very nice! I felt alert, focused and my internal temp cranked up a notch or two. I'm usually starving by 8am but this took the edge off my hunger. No troubles getting to sleep later that evening either. I know it was only a 1 day sample but I certainly liked it and it's something I may have to give a shot to my next "cut".