To calculate the overall star rating and percentage breakdown by star, we do not 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.
This is very pretty but in the picture it appears to have stiffener making it firm and can stand up. There is no stiffener, it's thin and floppy. The picture is misleading. I haven't used it enough to report on its strength.