Customer reviews

4.5 out of 5 stars
4.5 out of 5
554 customer ratings
5 star 78% (78%) 78%
4 star 9% (9%) 9%
3 star 4% (4%) 4%
2 star 3% (3%) 3%
1 star 7% (7%) 7%
How does Amazon calculate star ratings?