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.
I am disappointed that there is no general index of recipes and many of the ingredients are American, not easily found in English supermarkets. Consequently it makes an interesting read but hasn't inspired me to cook with it.