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.
Very good as a whole item but when it comes to the basket it’s very bad quality. The reason for that is the wholes are wider than it should be so the coffee extraction comes very quickly. I tried to make the come more fine and increase the amount of coffee in the basket but it didn’t work.