I am not a huge fan of stimulants and other than green tea, black tea, oolong tea, etc. I have steered away from them for years. I did not care for the YRD fomula and I did not particularly like way Jack3d made me feel either. I would describe the feeling with one word: 'Tweaked'.
I received some samples of and the new ingredient profile looked good, along with another ingredient that I haven't seen before. I have been transitioning my workout times, so I decided to start small and try out the Jack3d Micro samples. 1/2 packet was a good 'pick-me-upper', without a noticeable crash. I have tried 3/4 of a packet and 1 packet as well.
I must say that 3/4 of a packet of Jack3d Micro is a really quick, smooth, and long-lasting source of energy and focus, with minimal sides. If I take it and I'm rolling out to the gym, I'll be good to go before my warm-up is over. If I take it and I spend too much time sitting down before doing a task, I'll want to engage in something physical.
Overall, I am really excited about Jack3d Micro, because most pre-workout cocktails equate 'getting cracked out' to 'getting a good workout'. Maybe not many people know what it feels like to complete a productive workout, but it doesn't include getting euphoric off the pre-workout powder and then galavanting aimlessly in the gym for 3 hours using machines trying to purge the energy.