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.
These perform almost as well as the prescribed brand I get from the drugstore along with my other insulin supplies. They are a little loose starting on the injection pen, but tighten well enough and the needle is just as good as any others I've tried. This purchase gives me an extra supply buffer next time the drugstore forgets to order for me.