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.
Very light shoe and good for a run. In fact great for the price and very comfortable while walking. The only drawback is it's a bit hard to wear this shoe without a shoehorn, never done that for a sports shoe before. I am an Australian size 9 so I ordered a US size 9.5 but still not the right fit.