Customer reviews

4.2 out of 5 stars
4.2 out of 5
133 customer ratings
5 star 57% (57%) 57%
4 star 19% (19%) 19%
3 star 10% (10%) 10%
2 star 9% (9%) 9%
1 star 4% (4%) 4%
How does Amazon calculate star ratings?