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.
It somehow clogs up the razor, which results in nicks and cuts. It does not provide the lubrication that's necessary to get a good shave. The $2 "shave" cream available at the local chemist seems to do a far better job. I'd not recommend this.