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 5 boxes of these CD-RWs. The first box had 3 damaged discs -- when I tried to format them before using them for a backup, I got a message "Damaged or defective area on disc." When I looked at them I could see many scratches on the shiny side (not all in the same place) on the discs that got this error message. On the positive side, the undamaged discs work fine, and the slim jewel cases do save space.