I actually tried this stuff a while back and it seemed to work well. Problem I had with it is it's their "proprietary blend" so you can't see how much of each is in there...which I am always a little hesitant about as too much of this or that could always cause problems. Not to mention the price...it's outrageously high at anywhere form $45 to $65 a bottle. However I did see some results from it...and I don't recall having the jitters like you get from Ephedra products