Customer reviews

4.5 out of 5 stars
4.5 out of 5
840 customer ratings
5 star 71% (71%) 71%
4 star 16% (16%) 16%
3 star 7% (7%) 7%
2 star 2% (2%) 2%
1 star 4% (4%) 4%
How does Amazon calculate star ratings?