Product review (1 stars): Doesn't work and design flaw
This brush does not work.  Tried it on my hair, which is somewhat course and wavy and it did not work well at all.  Tried it on my daughters hair which is softer and wavy and it did not work.  On top of it not working, the design is flawed because the power button is right where you handle the brush and your thumb rests, so I was continuously turning it off on accident.  The only good thing out of this is that I was able to return it and receive a refund.