Customer reviews

4.3 out of 5 stars
4.3 out of 5
3,840 customer ratings
5 star 68% (68%) 68%
4 star 13% (13%) 13%
3 star 9% (9%) 9%
2 star 5% (5%) 5%
1 star 6% (6%) 6%
How does Amazon calculate star ratings?