I notice my focus and alertness increase about 30 minutes after taking Ciltep. It's not a burst of focus that one would expect to get and become a genius but you can definitely feel it. You can feel it stronger on some days over others. I think it depends if you take it on a daily basis.
I love the Smart Caffeine. I become extremely focused and even if there are distractions I get back on track pretty quickly. This has been very effective for me and I would highly recommend getting a bottle.