From simple appearance, or stripped, the mouse has very nice touch surfaces. The finish is perfect as far as the assembly and from the first use and despite a featherweight we know that we have between fingers an object of high accuracy which the study was dutifully push. The gliding impression is extraordinary and very low inertia allows high precision fast hooks. The materials used are unquestionably much better studied than those of the first non-4G version, even if the two models are very similar.
The ergonomics are quite fabulous and it takes time to realize that the subtle curves of the thumb grip on the left or the short side must right side are incredibly effective. Whether in the game or office daily use / CAD I never had any tension or wrist strain for me as the pose. It should be noted that there are two schools of users, those who grab the mouse full hand resting palm on top of the mouse and those like me, who rather like a direction fingertips. If you belong to the latter category there is a chance that this mouse fits you to perfection regardless of the use you make of it.
The adjustment of the side thumb buttons is a definite plus. The mouse clicks are a nice option and the wheel offers a best grip.
As for the characteristics of marketings resolution I think we can put them aside, I am using the 3500 dpi sensor max and less than 5 Front control screens, I doubt many use the maximum resolution capabilities. However the dual sensor system fulfilled its role perfectly and it really was impossible to take the defect even in extreme circumstances.
After a few weeks of use, I have fully adopted and, whether for CAD, office or play, it remains my best acquisition for mouse just after Deathadder, very simple and less programmable but perfect ergonomics and superb RAT7 which is fantastic but a bit too heavy: it is paid for the use and in actions requiring rapid immobilization of the mouse.
In short, I can only recommend this elitist choice for those who can afford or want to invest in high-end hardware, otherwise the price is quickly deterrent.