I've gone through 3 sticks now, and the unscented works best for me! (Other scents were trial sized.) I find I sweat less with it and when I do sweat it's not nearly as stinky. Easier to wash off than regular deodorant/antiperspirant too. When out on after sweating it immediately removes odor, and I've never had issues with irritation.
In the summer I tend to alternate between this and an antiperspirant as I'm in 40C+ a lot, but the fact that I can use it at all in the summer is great.
Love the unscented so much! I find most natural deodorants tend to have essential oils which is terrible for my skin and migraines, and for whatever reason I find most scented natural products tend to blend really poorly with my body chemistry. Love this, lasts for ages, works great!