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.
This is not a 3 button mouse. They pretend that it is, but, the default is to use the middle mouse wheel as a zoom function. I'm currently trying to figure out how to override this behavior. I'm done buying Logitech and want to warn anyone else who might think they can get a 3 button mouse from Logitech that they don't make any. Alternatively, the mouse manufacturing field is now ripe for the downfall of Logitech. It's not the engineering stupid, it's the stupid engineering.