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.
Love this product mine were very damaged from them being over processed from a last lift! This has made my lashes thicker and thankfully repaired the damage! I haven’t noticed much change in length, but my lashes were pretty long anyway!