Good, Medium-sized Brush.
What drew me into this brush is the fact that it's a mix of bristles to soften (porcupine bristles) the hair and can penetrate (nylon bristles) curly/kinky hair textures. I love too how I can feel the nylon bristles on my scalp; it's not too soft or too rough in texture; juuuuust right.
I do know that after brushing my hair, it feels less tangled and the texture feels a bit softer/silkier; however, I have dry hair that is never naturally greasy, so I can't say that I notice scalp oils being distributed throughout my hair.
As an FYI, I am of mixed race (Black/White) with 3B-3C curls, fine, dry, soft hair. My hair is long (about 6 inches down my back when straight), but I'm still keeping an eye out to see if the brush lends to any breakage, as my hair tends to break easily. So far, the strands that come out are mostly long with dead roots, so it seems to be a good investment. I've had my brush for a week now.
NOTE: I would never use this brush on my dry curly hair, especially with no product in it. I use it on blow-dried or flat ironed hair with at least a keratin leave-in (Dieci by La Brasiliana); eliminating the curls means that the bristles are less likely to get caught in my hair. If my hair was wet and with product, then maybe I'd consider just brushing the surface of my hair, but I just don't trust brushing/combing dry curls like mine, as it's a recipe for a rough ride and instant breakage.