Customer reviews

4.2 out of 5 stars
4.2 out of 5
7 customer ratings
5 star 81% (81%) 81%
4 star 0% (0%) 0%
3 star 0% (0%) 0%
2 star 0% (0%) 0%
1 star 19% (19%) 19%
How does Amazon calculate star ratings?