It works, but tastes pretty bad - yuck!
I hit an afternoon slump and felt like taking a nap, BUT after I tried it for the first time in a bottle of water, it worked GREAT, no more desire to nap, and I felt energized enough to continue cleaning up my house, and chase after my six year old.  Beware the unflavored, unsweetened taste is just AWFUL and somewhat hard to swallow for the taste.  I almost stopped drinking it because it..... for lack of a better word was plain "NASTY" to the taste/drink.  BUT it works! This is from somewho who has uses 5 hour, 7 hour, MONSTER drinks, coffee, green tea, JUST to name a few of my energizers!  I imagine if you are trying to cut back on sugar it would be the one to choose over citrus or another flavor available, it has no artificial colors or flavors, but beware of the BAD taste.  I gave it the TOP rating because it works when you need energy and I would drink it again bad taste and all.
Rating: 5 stars