wouldn't touch it for all the money in the world. i've heard about it, known people that have "bragged" about doing it, and there's even a segment on it on one of the faces of death videos. pretty nasty sh!t, right up there with crank and meth.
it was actually origonally created as a anestesia in the 50s. the "user" feels no pain, making it benificial to surgery. shortly thereafter, they discovered horrible side effects, including psychological side effects, and discontinued use. if memory serves me correctly, they used it for a year or two and then completely scrapped it. horrible disgusting nasty stuff. you'd prolly be safer if you ate toxic waste.
and no, i havn't done it. and no, i'm not in denial!