I did the neuroscience thing as well back in late 2005 or so - I was on Adrecor, Travacor, and some other supplement of theirs for a couple of months, though they didn't do me a whole lot of good at the time beyond giving me a small (though appreciated) boost in energy.

Despite the fact that it didn't do much for me, I really like their philosophy. I think if I did their test now I'd get an awful lot more out of it than I did then... though I've got a few other tests I want to do beforehand. Still, I might try it again some time.