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 was purchased as a standby mic. for a square-dance club (in Summer recess presently) so I haven't had opportunity to do more than a brief test. Sensitivity & range seem perfect for what we need, but the mic. is surprisingly heavy at just under 300g without cable attached.