Customer reviews

4.2 out of 5 stars
4.2 out of 5
19 customer ratings
5 star 50% (50%) 50%
4 star 31% (31%) 31%
3 star 7% (7%) 7%
2 star 12% (12%) 12%
1 star 0% (0%) 0%
How does Amazon calculate star ratings?