Customer reviews

3.7 out of 5 stars
3.7 out of 5
21 customer ratings
5 star 55% (55%) 55%
4 star 5% (5%) 5%
3 star 10% (10%) 10%
2 star 10% (10%) 10%
1 star 20% (20%) 20%
How does Amazon calculate star ratings?