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.
Love the fact that I have the means for zippers of any length I need. Bit tricky to get the pull on it though and I wish they provided the stop to keep the pull on the zipper. Otherwise good product for the $.