Good but needs to be paired with bonding treatment
"For reference I have color treated, medium thickness hair that’s on the dry side. Straighten my hair almost daily. I purchased the full size after trying the sample. I loved how my hair felt soft but also hydrated less frizz and coarse feeling even after straightening my hair. When used alone (without bonding treatment) I definitely could feel a noticeable difference between when I used the sample product along with the bonding treatment sample. It didn’t work as well. Which is why I took a star away. They were together amazingly but if I had to choose only one definitely go with the bonding treatment."