Customer reviews

4.2 out of 5 stars
4.2 out of 5
4 customer ratings
5 star 45% (45%) 45%
4 star 27% (27%) 27%
3 star 28% (28%) 28%
2 star 0% (0%) 0%
1 star 0% (0%) 0%
How does Amazon calculate star ratings?