|This can is tragically lacking in ridiculous promotional copy.|
Flavor: the can is blue, but the beverage is clearly neon yellow.* It tastes kind of citrus-y. A bit like a gummy worm, but still with that energy drink chemical tinge to it. Not too bad.
Effectiveness: It seems to be working pretty well. I was falling asleep at my desk a little while ago, and I now I'm feeling pretty alert. A while later, and still feeling good.
If you don't mind just a generic energy drink taste, this is definitely an effective and economical choice. No glowing endorsement, but recommended.
*And so soon will be my urine, amirite? Haha, I made you think about my pee!