Customer reviews

3.7 out of 5 stars
3.7 out of 5
4 customer ratings
5 star 68% (68%) 68%
4 star 0% (0%) 0%
3 star 0% (0%) 0%
2 star 0% (0%) 0%
1 star 32% (32%) 32%
How does Amazon calculate star ratings?