I haven't tried them, although I've heard of them.
I'm not one for supplements beyond multivitamins, and it drives me crazy when I see people exercise for a couple days and head for the Xendadrine, Ripped Fuel, Hydroxycut, Creatine, Andro combination.
But I think that there's definately a good reason to use them (nootropics) if they work well.
I was going to ask you about the piracetum (sp?) you bought, but I saw in the other post that you didn't get it yet.
-Ramon http://razor.ramon.com
