Personally I've grown quite fond of Assault but the store was sold out so I got a case of 1.M.R that was recommended to me by a buddy and don't quite know how I feel about it yet. My roommate swears No-Explode is the greatest but I just get jittery from it. And I believe Pump HD was the biggest joke made... Point is there's so many pre-work out supplements and I'm curious what's worked best for everyone else. What's your preference?