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.
They are excellent quality, the pulls are solid and not cheap feeling, and they seem very sturdy. I am using a bag I made with one and it is very smooth to open and close and doesn't feel like it will give out any time soon. Love them!