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 much heavier that expected, and can't be used for what it was for. It also took entirely too long to arrive, and couldn't track its progress - said it had been shipped for a very long time with no information. Seller stated they couldn't give tracking info. Didn't like, and seller not helpful.