Customer reviews

4.1 out of 5 stars
4.1 out of 5
20 customer ratings
5 star 44% (44%) 44%
4 star 38% (38%) 38%
3 star 7% (7%) 7%
2 star 11% (11%) 11%
1 star 0% (0%) 0%
How does Amazon calculate star ratings?