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 as such is of good quality, but is let down by the lack of self support, as it is just like a cloth bag , will collapse to the floor if put down. If you need to use it as a laundry bag, you will have to hang it somewhere. Also, does not have a top flap.