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 ordered this CD expecting to receive the Heartbreaker album supplemented by bonus tracks as per the descriptor, but instead received a bog standard copy which I already own. So 4 stars for the music as it's a fine album, 1 star for a totally misleading descriptor.