To calculate the overall star rating and percentage breakdown by star, we do not 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.
Mouse feels properly balanced and weighted. Not too heavy to move but not too light to induce over-shooting target. However, still some slight issues. Nit sure yet if it is the mouse or my system. Sometimes mouse clicks experience delays, action expected does not occur immediately - a time lag. Have yet to customise the additional buttons to see what the mouse can really do