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.
Fresh tasting filtered water always. So pleased I read the instructions, when all else fails it's best to do so, and now I understand why when I clean the water container why a black sooty residue sits on the bottom of the container. Important to soak each new filter before replacing old one for the time specified, as quite a lot of colour comes out which is normal. The only draw back is that I'm the one at midnight changing the filter while everyone else has gone off to play Halo.