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.
not even one star, when I opened and take a first look, i throw it away in a garbage can. Amazon, i used to be very pleased and satified in other product. But, this is a kind of joke, do the seller think that we are a foolish customer.