Works, no residue
I apply it in the morning and feel clean all day. It eliminates smell and doesn't leave any residue, no stains on clothes at all.
Though it doesn't make me dry. I still sweat but with no smell. Which works fine for me because other deodorants/antiperspirants don't make me dry either. So totally 5* and I'm never coming back to other deodorants (any crystal is good, not just this brand).