I always got a headache if I did too much Piracetam. Choline actually made it give me more of a headache, but not significantly so. Anyway, headaches were the problem I ran into from overuse, whether too much or for too long.
@azurefire Piracetam fired me up, and I loved it. I remember the first day I took the Choline with it and had a strong effect. I was at work and I was cutting up and talking a mile a minute and ultimately realized that I had to tone it down a bit so people wouldn't think I was on drugs.
Some years later, I used the Piracetam I had left on Monday mornings for a pot hangover. It works quite well for that and that was even mentioned in some of the smart drug lit.
DMAE feels just like Piracetam to me except that it causes a headache in me immediately, every time. Shame, since you didn't have to buy it from another country.