I had high expectations for this keratin treatment. Unfortunately, it is the worst one I have tried. While with other treatments, I could simply wash and blow-dry my hair and it would be fine, with this one, I need to straighten it with a brush and use a steam pod. Of course, the result is visually perfect. They shine and are completely straight. However, they are not very soft and slightly dehydrated. But the worst part is the smell. I have washed my hair four times and it still smells, especially when it is wet. Not something chemically intense like with other treatments, but intensely like rotten food, for example. Such a strong smell that even stays on the pillow. I definitely would not recommend it.