Not bad
I ordered this mouse because of its size and to replace my out-of-order sensei ten.
The ergonomics are mainly suitable for large hands and the weight management is very nice (I prefer slightly heavier than average mice).
I don't have enough experience to judge the dual sensor, but my average level of game play isn't affected by the change.
On the negative side, I'd say the small surface area of the anti-slip grips is literally ridiculous for my large hands, but this mouse is still a good investment given its fair price.