Works wonderfully for me!
I was a bit skeptical when I bought this, I get bad snarls in the back of my hair regularly, but I tried this and it actually works!  The bristles have a little 'give' to them, they are not rigid and I think this helps with the knots and detangling.  I am pleasantly surprised and not agonizing about having to brush out my hair anymore.
Rating: 5 stars