These were beyond horrible. I don’t think the increased mental acuity came from the caffeine but instead came from the absolutely disgusting taste. I tried them all, multiple caffeine levels. I had hoped they would get better with time, or even be masked if I tried having one with another piece of flavored hard candy - but no chance, the disgusting taste was too strong to be swayed. Wouldn’t recommend these even to prisoners as a form of punishment. 0/10