Hot Air Brush

How well do hot air brushes work on biracial hair?
I have really thick and curly biracial hair. My hair is about a 3b on the hair chart thingy and I want to know if I should invest in a hot Air Brush. I am planning on using it before I straighten my hair with a flat iron to make the process easier. Should I get the one with boar bristles or plastic bristles? How well does it work? What does it do? I greatly appreciate the help
If you get a hot Air Brush it will rip out your hair.Try getting a blow dryer with a pick attachment instead (works really good).It looks like this:http://www.misikko.com/chi-hair-dryer.html (you can see the pick attachment bellow it.
Hot Air- Dry Hair