As a result of my tests, I determined that this coloring shaker measured treatment by SOLUSTRE was a game changer for my hair color routine .The product is easy to use, mess-free and the color came out vibrant and shiny. The treatment also helped to nourish my hair and prevent damage. However, the only con is that THE amount of product in one shaker may not be enough for those with longer or thicker hair. Overall, I highly recommend this product for anyone looking to refresh and revitalize theirSee full review