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 fits as expected. Fabric is good. However, there are a lot of threads sticking out of the stitchings...I mean a lot. I had to literally sit with a scissor and cut out the extra threads sticking out. Looks like there's no quality control at the factory. Not expected at this price.