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.
There is not much that I do not like about this product. It is exactly what has been written in the description and is quiet a sturdy product to my surprise. A bit over priced but I guess because there are not many products like it in the market so they are minting on monopoly which is far enough