Customer reviews

1.5 out of 5 stars
1.5 out of 5
4 customer ratings
5 star 13% (13%) 13%
4 star 0% (0%) 0%
3 star 0% (0%) 0%
2 star 0% (0%) 0%
1 star 87% (87%) 87%
How does Amazon calculate star ratings?