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.
This was bought as a gift for a family who lost their dad in a climbing accident. The kids had the first few in this series so I don't know much about the series itself but the kids were happy to get them.