“Focus reminds me of watered down sprite with no fizz. That's not meant as a bad thing, that is just what the flavor reminds me of. Personally I would prefer a more tart flavor with less sweetness. But the flavor is still a nice flavor. I haven't noticed any effects from the caffeine. It must be a pretty mild caffeine. Depending on your needs, that can be a good thing. All in all, it's a different flavor that I include in the mix.”