Customer reviews

3.4 out of 5 stars
3.4 out of 5
5 customer ratings
5 star 18% (18%) 18%
4 star 17% (17%) 17%
3 star 48% (48%) 48%
2 star 17% (17%) 17%
1 star 0% (0%) 0%
How does Amazon calculate star ratings?