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 bought this cos Aveeno is a trusted product name, and was hoping that the shampoo would turn out nicely too. It lathered nicely - not too much, neither was it too little, and the scent was just nice too and not overpowering. I currently alternating this with another shampoo, and would get it again.