I was lucky enough to win a pottle of this from NZMuscle (thanks again). Jack3d Micro was a decent pre-workout. I am not very sensitive when it comes to pre-workouts, so I generally need to up the dosage. At 1 scoop, there were a few tingles and I could feel it working. Two scoops was the same. But with 3 scoops, Jack3d felt like a real hardcore pre-workout. I was incredibly focussed, felt explosive and had a decent vascularity pump on (even in my creatine cycle). I think 3 scoops is the sweet spot for me. I have tried multiple pre-workouts, eg; NO-Xplode 2.0, HemoRage, Superpump, and Assault. It's safe to say that Jack3d Micro would be a close second behind NO-Xplode 2.0. The convenient small tub size and scoop, as well as a good product itself makes Jack3d Micro definitely worth buying.