Customer reviews

3.1 out of 5 stars
3.1 out of 5
5 customer ratings
5 star 51% (51%) 51%
4 star 0% (0%) 0%
3 star 0% (0%) 0%
2 star 0% (0%) 0%
1 star 49% (49%) 49%
How does Amazon calculate star ratings?