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.
The product is great but very expensive. I ordered it over two months ago and received only one message saying "more time was needed" but I've heard nothing more back. I'm tired of waiting and wondering. I think this is very bad costumer service.