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.
I've tried so many different brands of pimple patches but COSRX is still the best. None of the others come close in effectiveness. Sucks all the gunk out! Doesn't do much for closed deep pimples though.
These are AMAZING!!! They dramatically reduce the size of pimples overnight and also the redness. However, would recommend putting these on first before any moisturiser or oil because they just fall off.