has anyone tried it before and what level of success have you gotten? i just want to lower my body fat percentage without having to stop eating all things that taste good. i was thinking of giving it a shot. i tried xenadrine before back when it had ephedra in it but i couldn't do that for more than a week cause i couldn't fall asleep and just felt all weird the whole time, but i figured now that it's ephedra free i'll think about giving it a shot.