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.
This soap delivered beautiful shiny and soft hair. I have streaks and it leaves my hair vibrantly blonde. It's easy to use and froths up well. It's definitely an excellent plastic free option that I will repurchase.