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 post seems decently made and is adjustable for badminton, and different volleyball classes. My only concern was that the photos show a base, but no base comes with it. I'll figure out some way to install it, but a better description would have been helpful.