Not for fine / thin hair.
This may work well for thick and/or coarse hair, but it did not work on my fine, thin, fluffy/wavy hair.  My hair would not stay in the brush well enough to get straightened.  Even after 10 minutes of using it, my hair was still pretty close to its usual amount of waviness.  I need to use a flat iron or blow-out round brush tool instead, given my fine hair texture.
Rating: 2 stars