Sherrie, in her video review of the PhD Dry Shampoo by Living proof, expresses her satisfaction with the product. She mentions that she has fine hair that ideally requires daily washing, but due to laziness, she often skips it. However, she is impressed with how this dry shampoo has lightened up her roots and added body to her hair. Sherrie wishes the viewers good luck with this product, emphasizing its effectiveness. Overall, Sherrie's review highlights the benefits of the PhD Dry Shampoo, particularly for those with fine hair who want to extend the time between washes. However, it is important to note that this review does not mention any potential drawbacks of the product.