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.
Comes with EVERYTHING (except nail polish remover) I never do my nails so I'm a beginner and this still made my nails look professional! The light is pretty cool too. Automatically turns on when you put your hand in their. My nails are brittle and I didn't have to do much prep, and hopefully this will make them grow longer.