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.
This gel kit was great, very happy with colour choices and quality, all exceptional and packaged well. I did need to purchase a gel nail removal kit though as it’s not in the starter kit. Will be purchasing more colours shortly.