I tried it, and got my money back. Maybe it's just me, but it produced no effect. I have also tried Focusfactor and got the same results, although it was good as a nutritional supplement. But nothing seems to affect me (caffeine, sugar, triptofan, whatever...), so I might not be the best person to give a good opinion.
Try it out if you want, and then return it if you want get your money back. I did and I even sent it back after the gaurantee ran out.
