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.
Not much to comment on here - it's a bit heavier than the charge-less one available in the box. Has a USB-A to USB-C cable (not too long but not too short either) included, an amber LED that lets you know when Joy-Cons are charging and a USB-C port (for the cable). LED goes off once they're fully charged and controllers will charge even with no console in the dock.