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.
I ordered 25 sets of these scales for a children’s Type 1 diabetes charity group that I run. They are excellent value for money and are exactly what I was looking for. The poor rating is due to ordering and being charged for 25 sets of scales and only receiving 15 sets. Amazon refunded promptly and I reordered another 10.