Customer reviews

3.7 out of 5 stars
3.7 out of 5
4 customer ratings
5 star 28% (28%) 28%
4 star 43% (43%) 43%
3 star 0% (0%) 0%
2 star 30% (30%) 30%
1 star 0% (0%) 0%
How does Amazon calculate star ratings?