I've only tried it twice. Both times, first thing after waking. Within 20 minutes, I can feel it. Its kind if a weird feeling to me. For having 200mg caffeine, I feel surprisingly calm and almost a high like sensation. I do not feel any tunnel vision like focus, really. The effect seems to wear off within a couple hours. It def gives me an interesting initial feeling. I have some bulk ALCAR and I was considering some Alpha GPC and Tyrosine. Maybe I will bite on them and try that trio without caffeine and see what its like. From the little research I've done, some seem to shy away from Vinpocetine and Hup A. FWIW, I took a full scoop both times. I've thought about 1.5, but that sounds like quite a bit if caffeine for me. The first time I took it, I had a Call of Duty marathon. Can't say it effected me much there. Today, I took it before work. I could say, it mildly put me into my work (I make Teeth/crowns). However, like I said, it wore off pretty quick. My experience seems quite different than what I've read anecdotely, however. My buddy who went in on the current sale, for a tub, doesn't seem to notice anything from 1 scoop. I told him 1.5 scoops should be okay to try. :/
From that, and the mild headaches I seem to get from bulk ALCAR, my initial experiences with nootropics aren't quite what I had expected. :/