To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
The zipper was fine, what I didn't like was the fact that it didn't come with tops or stops. And when I went on your site, you didn't have the necessary product to finish your own zipper. I had to order tops and stops from another company, and the sizes didn't match up. That was very inconvenient.