Customer reviews

3.5 out of 5 stars
3.5 out of 5
19 customer ratings
5 star 40% (40%) 40%
4 star 21% (21%) 21%
3 star 7% (7%) 7%
2 star 12% (12%) 12%
1 star 20% (20%) 20%
How does Amazon calculate star ratings?