Customer reviews

3.7 out of 5 stars
3.7 out of 5
4 customer ratings
5 star 47% (47%) 47%
4 star 27% (27%) 27%
3 star 0% (0%) 0%
2 star 0% (0%) 0%
1 star 26% (26%) 26%
How does Amazon calculate star ratings?