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.
So. I ordered this in advance of the 25th and as such had it in my desk for a few weeks. It arrived as promised and in the stated I expected it to be. When presented to my wife she was very happy and all the elements were inside as described. After the initial set up phase she has worn it everyday with no hitches. All in all great experience and very happy with the product.