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 purchased two of these items, one of them was pretty easy to install and everything went smooth but the other one I was struggling a bit but at the end it worked. They seem to be pretty good quality, we'll see how long they last.