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.
Rackets are Good, however after a use of month I can see grip has started moving a bit and will need some adhesion to keep in the same shape. Shuttles provided with rackets are of no use. All 3 shuttles broke in 2 days with not even 2 hours of play in total.