Guy I know swears up and down on this stuff and gave me a sample to try. I'm sensitive to stims and really like Alphamine cause the stims aren't too ridiculously high dosed. Let me know your thoughts on this stuff, honestly when it comes to fat burners, I've found the best combo to be: L-Carnitine, Yohimbine, 7 Keto, and green tea as it's what Im running right now for my show and seeing amazing results with diet and cardio.