Disclaimer: I received a sample as part of my JackedPack to review for free. As always, all opinions are my own.
I didn't get a rush from this but I know it kicked in as I got that tell-tale tingle in my face which moved to my hands. It drove me nuts during my run. I got in a decent workout, but didn't feel any extra pump. There was no crash after, which is always good though. Over all ok, but I'd look elsewhere for extra energy.