Customer reviews

2.5 out of 5 stars
2.5 out of 5
4 customer ratings
5 star 16% (16%) 16%
4 star 16% (16%) 16%
3 star 0% (0%) 0%
2 star 34% (34%) 34%
1 star 34% (34%) 34%
How does Amazon calculate star ratings?