To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Up close these aren't the highest craftsmanship, but they look good from a moderate distance and for the price they are at least as good as I anticipated. They are relatively sturdy and have had no trouble holding up the set of O'Reilly books for which I'm using them.