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.
The product has been good so far. Even an amateur can prepare all kinds of dosas, crepes with this cookware. Received, however, a product with minor defects (the surface was not smooth and had grain like deformity to the feel). Don’t cheap out on the silicone based spatula to be used on this one though.