Customer reviews

3.2 out of 5 stars
3.2 out of 5
5 customer ratings
5 star 18% (18%) 18%
4 star 31% (31%) 31%
3 star 25% (25%) 25%
2 star 0% (0%) 0%
1 star 25% (25%) 25%
How does Amazon calculate star ratings?