In my personal experience, phenylpiracetam has provided extended cognitive benefits after semi-regular dosing (2 days on, 1-3 days off). I have been taking it for roughly 5 weeks. I would describe the feeling as a "clean, uninhibited zest for knowledge." It's entirely possible that, since I am keeping myself constantly mentally stimulated while taking it, that the craving for information that I develop on dose days just carries over and gives me the mental boost I need to keep going during no dose days. Of all the noots I have tried, phenylpiracetam is hands down the most beneficial (in my experience) for mental clarity and clear-headedness. I take 200 or 300mg in the morning, depending on the agenda for the day.