I drink some that I have that are sugar free so they don't give you the buzz, then the crash, and they are chock-full of vitamins, so they are good for you. (plus no carbs) They will wake you up without making you jittery(most people anyway. There are a few people that I hae given one to that have gotten really buzzed, but they were high-strung to start with.....)

Oh yeah, They taste GREAT!!!! Not like the crappy Red Bull stuff.......