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 seems to be the waterproof version (although it doesn’t say that anywhere), since it doesn’t come off easily like the regular one. I’ve been buying this mascara for a few years now, and love it, but this is different and not for me. As a waterproof mascara, I’d say it’s brilliant, it hasn’t been dry clumpy or flaky for me.