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've purchased a few screens for my children's DS's, and so I was very surprised when this arrived and was simply in an envelope. But these screens are perfect. They're the perfect size, and they go on better than any other ones I've used. And for the price, there's no risk!