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.
Completely let down by seller. Purchased an acceptable book that turned up in a horrible state with stickers and coffee/mud stains all over it. Was advised I would receive a refund which 2 weeks on still not received. Will not be using again.