Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
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 analyzed reviews to verify trustworthiness.
I ordered this secondhand and was sent the Spanish version. The handbook and the cover was in Spanish and so the thing was returned. Not Amazon's fault and the whole matter was cleared up quickly but....ho hum!!!