The sensitivity can be set up by pressing a key up to 5500 dpi and the mouse responds for my taste in all settings just fine. However, I am not an absolute pro gamers, the notice the smallest lag. For the ambitious gamer like me the mouse is sufficient. Even with the ergonomics of the mouse, and the availability of additional keys I am fully satisfied. The hand rests on good and the side buttons can be operated well with the thumb. However, you can make clear differences to brand mice (such as Logitech etc) in the manufacture and the materials already, also the haptics is the latter better. But well, somewhere the low price has come indeed.
In practice, the mouse is beside the gamble even in normal use, like surfing. Here you can use the extra keys as to advance or scroll back in the browser. It is a pity that there is no adjustment software to demonstrate the key functions in normal operation with one's own choice. The mouse was incidentally detected under Windows 7, as well as 8.1 smoothly.
The gaming mouse from VicTsing so you get a solid mouse for gaming. For the price you can hardly get more and ambitious players should be happy with it. Only absolute pro gamers engage rather than a mark mouse.