Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
I have always found Rieker shoes to be comfortable until now. Unfortunately one of the shoes has a small lump at the bottom of a zip that rubs on my foot. I have tried wearing extra thick socks. My new plan is to try to stick a piece of sheepskin over the lump. Obviously disappointed but it won't stop me ordering other Rieker shoes.