Customer reviews

3.9 out of 5 stars
3.9 out of 5
5 customer ratings
5 star 71% (71%) 71%
4 star 0% (0%) 0%
3 star 0% (0%) 0%
2 star 0% (0%) 0%
1 star 29% (29%) 29%
How does Amazon calculate star ratings?