Customer reviews

4.4 out of 5 stars
4.4 out of 5
7 customer ratings
5 star 66% (66%) 66%
4 star 19% (19%) 19%
3 star 0% (0%) 0%
2 star 15% (15%) 15%
1 star 0% (0%) 0%
How does Amazon calculate star ratings?