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.
Some of the fabric used would work perfectly and stay while others I couldn't clamp them down enough to stay on one side. The product itself wasn't difficult to use once you got the hang of it. There was a little bit of finesse needed to clamp it just right. Out of the 12 that I did, probably 4 or 5 worked out great for me.