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.
UPDATE: was frothing warm/hot milk today and the metal stick broke while frothing and had the cup tip all over my thighs. Not worth it at all - waste of money
The metal stick is so loose it shakes all over the place whenever I try frothing. I thought it was meant to be this way and kept using it for 5-6 minutes until my sister told me they're not meant to be like this. Slightly annoyed