Hab get today the mouse, immediately unpacked and tested. Good processed also fits comfortably in your hand but from the quality I find the G9x better. Now I wanted so the function with the weights 7.5g 4x test weights in the box pressed and then to breath in the mouse. Hmm too heavy, she would then rausholen again and lo and behold IT DOES NOT WORK! The thing plugged as simply fixed! At a 60 expensive mouse should such a thing is not the case ... Furthermore, I have to say that the beep really gets on my nerves. 've Already seen a number of reviews on Amazon here and thought it can not be that bad ... error. Well, it'll give it back to return otherwise the mouse is really good and also the driver is built course.