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.
Perfect fit for my memory foam double sized bed. I bought this as mattress protect to avoid any stains/spills on new mattress. So far it's been working well for me. My mattress has a top layer of gell infused memory foam which i think doesn't work well with this protector since it had a quilted cotton made fabric as a top layer, which makes summer nights warmer while sleeping but for sure it will work great in winter.