Customer reviews

3.2 out of 5 stars
3.2 out of 5
7 customer ratings
5 star 39% (39%) 39%
4 star 13% (13%) 13%
3 star 0% (0%) 0%
2 star 28% (28%) 28%
1 star 21% (21%) 21%
How does Amazon calculate star ratings?