I have very long, wavy hair that is prone to breakage. I didn't realize how much damage a regular brush was doing until I started using it again. This stops at the tangles so you have a moment to gently brush through it instead of ripping through like a normal brush. I wouldn't recommend this for extremely thick or extremely curly hair cause when my hair's curly or really wavy, I have a harder time getting the brush through but I can't say for sure whether it'd work for the thick or curly haired though. Either way, it's worked amazing for me.