I don't usually think about product quality or things like that, but Mitchum is the best underarm deodorant I know. I wouldn't use anything else. I've used it for over 20 years. I sweat a lot and it has always helped me stop stinking. I don't really notice it's effects so much unless I stop using it or use somethng else. Then I can small myself stink, but never with Mitchum.
I used to live in Paraguay in South America where its very, very hot. People told me I sweat more than anyone they ever met. I brought Mithcum with me or had my mom send it. I don't sweat as much as I used to, but I still swear by it.
Also, it's effects usually last the second day, so if I forget to use it, I'm ok the next day. If your friend stinks, please help him, and the people who have to smell him. Thanks for asking-Jason