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.
This is almost perfect. It's a little difficult to clean with water but otherwise it's perfect to keep infornt of the litter box. Catches all the litter and isn't uncomfortable for the cats to walk on. It's really big and covers a big area. Smell doesn't stick to it.