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.
The wire on one of these came out of the shrink wrap as I took it out of the package. There was no solder at all, which admittedly, is far too small to successfully repair myself. Ordered replacements, will update the review when they arrive.