The only effective deodorant I've ever used. Dominates useless name-brand fragrance-reliant deodorant, and blows away chemical-laden unnatural antiperspirants. I've even given several as gifts, and heard good reports - but there has been one issue frequently reported to me, that I've also experienced.The issue arises from over-applying the deodorant. When over-applied, minor skin irritation can occur but this is easily remedied by applying it more sparingly. Rather than covering the whole armpit, as one would do with ineffective name-brand sticks, I swipe the deodorant on the outsides of the armpit, then rub my arms about to spread it further. Doing that, I've never had a problem, and have been B.O. free for a couple years, now. Great stuff, Granny Smith. Keep it up.