To calculate the overall star rating and percentage breakdown by star, we do not 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'm using this with my tenkeyless mechanical keyboard and it feels nice and comfortable when I rest my wrists on it while typing. It's got the perfect thickness to it too. My only complaint is that it slides around too easily on my wooden desk. Having more weight in it or lining the bottom with a grippier material might help make this product better.