I'm curious to hear what members here use. I don't usually use a pre-workout, but I'm getting back into heavy (...for me, anyways) weights, and taking something before a workout helps me a lot in that case.
I used N.O.-Xplode for a while, and it seemed to work well, but that was years ago, so I assume things have evolved since then. I can't handle uber-potent stimulants: the recommended dosage of Hydroxycut Hardcore makes me sick.