Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
The sound is ok. I bought these because of the over the ear feature is a must at the Gym. My biggest complaint is the charging case. It sometimes doesn’t charge one side. My opinion is it’s not worth the price.