I bought the G403, and oh joy . the mouse is damn comfortable in the hand, as if flying in. Lovely click and mechanical handy wheel. You can disassemble the g502 and remove the damned springs, but then there will be a backlash. Some pros: Quality, optical wheel, all the qualities inherent in modern gaming mice. Some cons: The opinion is subjective, because my hands seem to be gentle, like a dove: the mouse click is hellish for me, my fingers start to whine (and I am with them); the wheel, the optics is of course good, but it is iron and very heavy, especially disgusting when it is cold . I turned it.