Customer reviews

4.4 out of 5 stars
4.4 out of 5
3 customer ratings
5 star 42% (42%) 42%
4 star 58% (58%) 58%
3 star 0% (0%) 0%
2 star 0% (0%) 0%
1 star 0% (0%) 0%
How does Amazon calculate star ratings?