I use this for normal days when I know I'll be at the office, and it works great. But I find that if I'm outside working, or if I have an extra-hectic day at work, or even if I get very nervous or stressed-out - anything that makes you sweat more - then I can smell me. And if I can smell me, other people probably can too. My work has private restrooms, so it's easy to freshen up, but unfortunately I can't trust this product in more challenging situations. When I run out of it one day, I don't think I'll buy it again.
Unfortunately this is not a winner for me... It does go on clear and does not stain the clothes, something that I love. It is also fragrance free. I haven't tested it in extreme conditions but my guess is that it will not do a great job. On a regular day with moderate sweating it will keep the odor down but not completely under control, maybe reapplication would help. The huge problem that I found with this is that it is rather sticky and fuzz from the clothes will stick under your armpits, not a pretty sight in the summer!!!