Hey, I've been lurking a while and had to chime in. Obviously I'm a huge fan. Dude, Jack3d on an empty stomach puts you in the ZONE like you can't believe. There's a bunch of research/reviews/side-effects/ingredient info on this
Jack3d site. You need to double-check if you're getting drug tested though, because the 1,3 dimethylamylamine can set false positives for amphetamines... that's how cool that stuff is.
I say go for it if you're not being tested, and if you are, talk to your sponsor.