I was disappointed to discover I´m allergic to soda when I first used Schmidt´s lime deodorant because it was the first ever aluminium free deo that was working for me. I tried several others, and tryed other soda free, nothing worked more than a few hours.
With this one, I am smell free even with crazy high temperatures - only 4 stars though, because it leaves some kind of tiny bits of product on the skin, but to me that´s a detail.