Customer reviews

4.1 out of 5 stars
4.1 out of 5
20 customer ratings
5 star 51% (51%) 51%
4 star 25% (25%) 25%
3 star 12% (12%) 12%
2 star 0% (0%) 0%
1 star 11% (11%) 11%
How does Amazon calculate star ratings?