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 like the filter, i like the design. But the neck of the contraption was a little wide, so extra care has to be taken when handling it. And because of the shape, you have to tilt the whole thing over to get out the last bit of coffee. Filter is good though.