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.
The device is good. Looks nice and performs fast. The most critical issues is that if in a call the caller disappears from the screen and in order for hanging up the phone you need to find it in the running apps list. Hope Huawei will fix it ASAP. Also the color is very nice but using phone without cover is unreal because it becomes dirty in seconds.