Review on Black Logitech G604 LIGHTSPEED Wireless Gaming Mouse - Up to 240 Hour Battery Life, Dual Wireless Modes, 15 Programmable Controls, Hyper-Fast Scroll Wheel by Eunu ᠌

From the point of view of the filling and capabilities - I consider this particular mouse the pinnacle of evolution, for any money. In terms of ergonomics, I personally liked the g502 shape more. But from the point of view of the filling, the g502 lightspeed raises questions, and costs twice as much!