I had slightly different experience.

I started taking it a night before bed with food. 4 hours later I would pop outta bed and think it was time to get up and would start taking coffee....until my wife with come in and ask me what I was doing and I would shake out of my fugue.

Then I started taking it in the morning and I would be dead tired for about 4 hours then *snap* I would be wide awake and on like you wouldn't believe.

Had to stop because the balance was too much.