Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
Came very quickly and works exactly as expected. Unlike some other phone cases i've had in the past, this case has no problems being used as a stand for the phone. As for how well it works for protecting the phone, the phone that was put in this case already had a pretty severely cracked screen and it hasn't gotten any worse since, so, as far as I can tell, its doing its job :)