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.
This knock box looks great in stainless steel next to my Breville Barista Touch. But as always I think things could be improved... My biggest complaint would be if you mix the grounds too wet and they won't knock out. It would have been nice if they put something like a small knub on the top so that you can balance/rest the portafilter over it and let it drain. In its current design there is no way to do that as the portafilter would just fall in.