The effects of this product were very subtle but by day three I definitely felt like it was giving me a edge. Things were going smooth at work, was getting challenging tasks done right in one and done. You know those days when everything goes right and falls into place without struggling? Well that's how things felt after a couple days in.
I didn't feel anxious or jittery at all, infact I didn't think it was affecting me. By day three my work was becoming more efficient and precise so I do think it helped.