For Gamers, by Gamers ...

It is for me a perfect mouse.
Happy owner for 3 years a Razer Copperhead, I had the opportunity to change, and I do not regret it. (I Precide the Copperhead was still in perfect working order, despite three years of daily use).
After hesitating between different mouse models and Cyborg Razer and its devastating look, I decided to play the security card (because the investment is therefore rather for a mouse) taking this Razer that seemed the best value price / quality (for a 50aine of budget).

To compare with my old mouse: the copperhead already had serious advantages: sensitivity settings, ambidexterity, precision and speed. A mouse for cut fps.
With Deathadder, the changes are not major. We keep the basics with some changes: there is a mouse a little larger which nevertheless proves in the end to a perfect ergonomic service. The hand is wedged perfectly on the mouse. It is covered completely with a very nice soft material and also gaining dpi (4000 against 2000) even though I do not feel a huge difference. All delivered in a package look great with the drivers on CD.

Finally, this seems to razer pruned for rts for the fps with a significant gain in comfort but personally I see no difference whatsoever ingame on Starcraft 2 or CoD, I just gained in comfort without losing any of strengths of the Copperhead.

Anyway, this Razer is a high-end mouse can seem a bit expensive for a mouse, but even for office use, comfort is there for the world and I would return to a classic mouse model. Do not hesitate!