I'm a super heavy weight strongman and power lifter who is currently cutting down to compete in the 275s. I've logged a few other pre-workouts on another forum, but would be very interested to check out Purus Lab's offerings. I've used Muscle Marinade several years ago and liked it quite a lot, but from what I hear, it has a new and improved formulation.
Current training goals are to show up lighter and stronger to a NAS strongman contest in 3 weeks and the UPA meet in July. I run a 5 day program designed by Steve Shaw focusing on squats twice a week, pressing twice a week, and deadlifts and strongman events once a week. This takes a toll and a good pre-workout can really assist in keeping moving on the hard days.