So before you buy this product, I learned about a lot internet and results over me !! Frankly it is not super complicated to do, just different flushing that are somewhat troublesome! The instructions are in English so no top for those who are not strong in English aps after we find information on the internet! My hair thinned are 2 colors (2 untracked aplications). I had to put a lot of hair oil to nourish my hair later, I find that with all rinses and water quality, bah my hair was really dry. But honestly for the result I have no regrets and I recommend it. Small details the smell is really strong and not at all pleasant
