I find that I'm more clear headed, awake, and light with caffeine melts than with coffee or energy drinks which take more to kick in and have me kind of awake but heavy, yawning, feeling foggy, wired, anxious, then tired again. I like that the melts come in different dosages as well so you experiment with how much to take. My only issues is with some flavors you can taste the bitterness of caffeine more others mask it well.