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.
Had these a while and really liked them. The clear plastic sleeve that holds the thumb drive is getting stress marks after 3-4 months. Still he best design I have found though. Will try to sew something in if it fails.