Customer reviews

4.4 out of 5 stars
4.4 out of 5
309 customer ratings
5 star 68% (68%) 68%
4 star 17% (17%) 17%
3 star 9% (9%) 9%
2 star 3% (3%) 3%
1 star 3% (3%) 3%
How does Amazon calculate star ratings?