Before that, there was an XL 740K model from the same company. Why did I fall for the reviews about the low noise level? It usually makes even more noise than before. The mouse is not comfortable in the hand and in control. while the arm is half-stressed. In addition, the previous model was with a weighting agent and moved more clearly. The plastic of the buttons still rattles, it's plastic. In the old one, the entire body was rubberized, the mouse lay perfectly in my hand. My hand is large and gets tired from inconvenience. Do not chase design and versatility. yourself at the wireless level from Logitech for 500r no higher