Used this on soaking wet hair with some leave-in and the curls came out defined with way less frizz than my usual routine. The 9 rows of pins give real tension when I'm blow-drying too, so I get volume at the roots without it snagging.
I was skeptical about a brush actually defining curls, but running this through wet hair gave me real spirals instead of frizz. The nine rows grip nicely without snagging, and it's become my go-to for shaping long layers.