Customer reviews

3.4 out of 5 stars
3.4 out of 5
21 customer ratings
5 star 39% (39%) 39%
4 star 9% (9%) 9%
3 star 18% (18%) 18%
2 star 19% (19%) 19%
1 star 15% (15%) 15%
How does Amazon calculate star ratings?