I bought the strengthening not realizing that it was a protein treatment. My hair doesn't need protein. I only use this every two weeks because its a matrix product, so even when its bad its pretty good. The smell is good, nothing amazing nothing awful. It did strengthen my hair, but too much protein leads to breakage so I'm kind of getting the shaft. I wish I could somehow get the hydrotherapie products. That is some amazing conditioner and shampoo. I wouldn't recommend this product unless you are desperate for protein in your treatment. Go with the hydrating products.