What can I say, gentlemen. The mouse is really worthy! I can't say anything bad. Now I use it in parallel with G15 and G13. The driver is one for all devices from Logitech. There are no conflicts. I can't stop rejoicing! Many write that you need to get used to it . Yes, it is. I, too, when I transfer from Audi to VAZ, I feel like in another world. Each mouse requires special habituation. Hand size is also important. I have a huge hand, and my girlfriend has the opposite. But we are both comfortable using this device! Of course, the price is also not unimportant, but this device is worth it!