Customer reviews

3.1 out of 5 stars
3.1 out of 5
4 customer ratings
5 star 25% (25%) 25%
4 star 0% (0%) 0%
3 star 34% (34%) 34%
2 star 41% (41%) 41%
1 star 0% (0%) 0%
How does Amazon calculate star ratings?