Customer reviews

3.8 out of 5 stars
3.8 out of 5
4 customer ratings
5 star 33% (33%) 33%
4 star 19% (19%) 19%
3 star 48% (48%) 48%
2 star 0% (0%) 0%
1 star 0% (0%) 0%
How does Amazon calculate star ratings?