This stuff is amazing! I've gone for 5km runs in 35 degree weather, 95% humidity, and come back dry and fresh. I hate seeing people raise their arms and seeing this gigantic wet sweat patch on the underarm of their clothes, so I'm fanatical about my anti-perspirants. This really, really works! And having been stranded once without my luggage, I can attest that you can actually skip a day - it lasts 48 hours.
There are some minor issues: it does sometimes leave white patches on your skin because the texture's runny so it's easy to overapply. Also, as noted by other reviewers, it can take a while to dry. But it's cheap, incredibly effective, last forever and lives up to its claims. What's not to like?