Having used both the viper v2 pro and viper v3 pro series, I especially like the viper series, but I think that razer has both dpi devitation and high latency values on the sensor side (I think this is because the sensor is a bit sensitive and other polling rates are not stable), which affects a mouse at this level badly, especially when I switched from viper v2 pro to viper v3 pro, I was using 800 dpi in 2 mice, when I switched from viper v2 pro to viper v3 pro, 800 dpi comes to me faster than it should be, it does not move slowly on the desktop like before, So even for the viper v2 pro there was dpi devitation but at the time I thought that the dpi devitation was very nice and evenly distributed and that it wouldn't be too much of a problem but I was wrong, now it is evenly distributed for the viper v3 pro again but when I switch from another mouse to this mouse it comes faster than it should be, especially for someone like me who writes something on a pdf with a mouse on the computer or travels a lot on the desktop, it is an obvious problem that can be noticed immediately. I hope they fix things like sensor latency and dpi drift with firmware updates, because on the other side, logitech has increased the quality of the sensor and reduced the latency values with the firmware update