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.
It's much lighter than compared to my logitech but so is the price. Aftera while, starts getting used to it. Function wise may not be as good as my logitech or HP 5 button mouse but it's good enough. Will recommend to buy it for this price.