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 love mattresses firm underneath with a soft topping. This mattress is very soft throughout, nearly collapses when I sit on the edge for the tiny second required to get into bed. The worst bit is that the mattress slips and slides. Still trying to find a solution.