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.
Underwhelmed. The activities are boring and repetitive. This was expensive for the cheap product it is. The activities look like someone print off the internet and slapped them in a book, very lame and boring.