Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
I purchased this clarifying shampoo on the recommendation of a YouTube hairstylist (not sponsored, this is just what she uses) because my hair was feeling dirty and weighed down even after it was freshly washed, and boy was I pleasantly surprised! The shipment came very well packaged (perhaps even excessively so, but at least it was I damaged) and arrived earlier than estimated. This shampoo worked so much better than I had anticipated! After using it my hair felt so clean and light, and was noticeably shinier and softer than usual. I will definitely continue to use this product for a long time to come!