Having tested other products of the same type, this one is the best. Not only it does not leave a greasy film on the hair but they are also more soft and shiny and my smoothing lasts longer. Having the hair end, they easily degrade over hair straighteners even using products to protect but with this one, I see the difference my hair is really protected. I recommend and I would buy her and suddenly makes me want to test other products from the same brand.