Just took 250mg of this substance every day for a week. Absolutely best I have felt in years, even before taking Propecia. Energy levels were through the roof. Ended up working over 80 hours at my that week just because I had so much energy. Gym workouts now were not only possible but I was able to power through them with ease. Visual perception was also greatly enhanced-vivid colors, etc, just improved visual sensory overall. Have to take with a choline source if you get headaches and tolerance sets in fast. Stop getting an effect entirely after that 1 week. Going to do 1 week on/off from now on. I recommend trying this substance or other of the Racetams to improve energy, wellbeing and physical stamina. They all have vastly different effects so lots of research is warranted.