This is the second brand of hair serum I have received from Birchbox and would call this comparable to the other - which is a big compliment. I love this product. If I blow my hair dry without a product like this, my head turns into a big puffball (and I have straight hair!) When I use this product, my hair is light and soft and manageable. My hair tends to be on the dry side so I do not have any issues with this causing my hair to be too oily - I don't know if someone with more oily hair might have problems or not. I personally find it to be delightful. I love the scent, effectiveness and the entire idea of the product. I would absolutely buy this product!