This paired with the shampoo makes my hair super soft and hydrated. It's actually designed with curly hair in mind but mine is straight but I love it. It is expensive but you only need to use a little bit of it. The conditioner is quite thick and goes a long way. The scent is subtle and I really like it. This is sulfate free and can be used on colour treated hair. I can't really comment on the straightening aspects of this because I already have straight hair but it does feel more hydrated and less frizzy. Love it!