yeah, you basically just wash your hands but without water or soap. It does nothing for like 20 seconds, then you can feel them drying and they're done 10 seconds later.
If you've used a hot qair hand drier, you have at least walked away with hands as germ ridden as they would've been if you had washed them in the actual toilet. Warm air + moisture = a germ factory and distribution centre. Better to use paper towels or let them dry on their own.
All they do is leave your hands wet while just spreading tons of germs