Customer reviews

4.1 out of 5 stars
4.1 out of 5
4 customer ratings
5 star 40% (40%) 40%
4 star 44% (44%) 44%
3 star 0% (0%) 0%
2 star 16% (16%) 16%
1 star 0% (0%) 0%
How does Amazon calculate star ratings?