Review (4/5): It does work, but...
It's a decent product and it will keep your B.O. at bay, but NOT for 72 hours. That's just plain false advertising. I find it works around 36 hours tops, but you should really apply it everyday. It's also not the best smelling stuff, but that wanes after it dries. Its one BIG redeemer is that it is one of the only deodorants out there that is good for sensitive skin. My underarms tend to break out in a rash in response to 9/10 of the deodorants out there. I have to use Lume or Arm and Hammer. Personally, I don't think there's much difference in efficacy, but I will give Lume an edge on longevity.