Excellent mouse almost all points.

This mouse first has excellent characteristics:
- Neat design [the buttons are well placed & fall easily to hand]
- Excellent material quality [soft touch rubber touch, braided cord, etc ..]
- Functionality plethora [thanks to buttons 11 & 3 profiles, a single continuous roll knob plus 3 clicks, etc ..]
- Downloadable software allows to have a good basic feature list and take into account the specific features of many games [gaming mouse requires], so for assigning macros to own some games, without having to go by the configuration of the buttons,
- DPI is EXTREMELY high [up to 12000 which nobody uses, but is set on 5 levels per profile] and precision in moving,
- The laser sensor that works perfectly on many surfaces,
- Ergonomics that should appeal to much for those kind of palm-grip [those who move the mouse with the palm, so with his hand on the mouse]
- Mouse customization [hatch below the mouse that is magnetized, very well positioned to evenly distribute weight mass, customizable illuminated logo but not in color].

Some negatives though, because everything is not perfect:
- Ergonomics, if the mouse is suitable for palm-grip type that does not really suit the claw-grip [those who move the mouse with fingers]. The mouse is especially length [I have a preference for broad mouse]
- The wheel in normal working mode, I personally find that the notched bearing seems very heavy and it's not pleasant. The freewheel mode dial is a little too sensitive,
- All buttons are all usable in that state, although the mouse has 11 programmable buttons. In fact, these buttons has no name, so it is impossible to assign them specific function macros [to be clearer, apart left button, right button, click wheel, the other buttons do not have a name, it No button 4 button 5, button 6, etc ...]
Personally, I'm very happy [because I found it on Amazon for 56 instead of 80, free shipping]. Level value for money, I do not think better. After being claw-grip, the mouse hand get tired, so after 2 hours of play, I have the little finger ring & that are a little stunned. But in normal use, I have no pain even after 3 hours of use.