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.
It was not easy to use or bubble free. When trying to line up with the screen and i stalling it, it would off center itself and not adhere to the screen fully. After a few atemps I did get it center but a corner will not ahere to the screen and when trying to push out the bubble it just comes back. Will not buy again.