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 sure why the reviews are good or why Amazon would sell such cheap products - the mat is not a play mat, its a piece of disposable plastic. It's all junk and I wish that I hadn't wasted money on this - please be aware