I used tribex 500, 4-AD-EC, Methoxy-7, T2, and M. To summarize, crap, crap, giant load of crap, overpriced, and crap. As far as tribulus goes, if ya need it, go for Syntrax's FUZU; that's the best i've tried. I've had friends who used Mag-10 who were somewhat satisfied with the results, but who retrospectively decided they would have rather spent their money on more promising pro-hormone products such as 1-AD (ergophargm) or 4ADerm.