Customer reviews

4.3 out of 5 stars
4.3 out of 5
20 customer ratings
5 star 60% (60%) 60%
4 star 21% (21%) 21%
3 star 12% (12%) 12%
2 star 7% (7%) 7%
1 star 0% (0%) 0%
How does Amazon calculate star ratings?