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.
These were purchased to replace a broken one and increase the number I have. I find them really stylish but my husband says he can't drink out of them. I still like them but they are a bit on the pricey side for a mug.