I'm African American with a slight mix of 4a/b hair
This brush works pretty well. It doesn't give a flat iron/pressing comb kind of straighten but a better version of a blow dry straighten. It was great, I separated my hair and brushed it and it turned out how I wanted it. My brush is missing a couple of "teeth"  which sucks because it's already broken but it's not bad enough to not work.
Rating: 4 stars