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.
Worth every penny. The shirt is very comfortable. The size is spot on. The material is very good quality. But the color I chose made me confused. The first time I thought it is black and about to make a return. The blue color is very deep and only visible in sun light. But looks superb...delivery time is very long.