Customer reviews

4.1 out of 5 stars
4.1 out of 5
12 customer ratings
5 star 47% (47%) 47%
4 star 31% (31%) 31%
3 star 11% (11%) 11%
2 star 11% (11%) 11%
1 star 0% (0%) 0%
How does Amazon calculate star ratings?