Tricky but Working for Me
I've been taking this for about a month.  I take it about 4 hours before my workout and I feel that it helps me exercise harder and longer. I seem to enjoy the workout more when I take this.  I exercise in the evening, and I was originally taking it 1 hour before my workout but I found that it was interfering with my sleep so I started taking it earlier in the day.  That has worked out very nicely for me.<br /><br />Update:<br />I actually stopped taking this before finishing the bottle and gave the remainder to a friend who also works out and uses it.  My experience was that it really did make my workouts much better, but I was having side-effects.  I was much more emotional than usual and also have sleeping problems. Too bad, because I would have really liked to keep using it.
Rating: 4 stars