Customer reviews

4.4 out of 5 stars
4.4 out of 5
2,129 customer ratings
5 star 67% (67%) 67%
4 star 19% (19%) 19%
3 star 7% (7%) 7%
2 star 2% (2%) 2%
1 star 5% (5%) 5%
How does Amazon calculate star ratings?