Very good mouse
The mouse is great, responsive, the battery lasts a long time, accurate and the button on top of the mouse allows you to quickly change the sensitivity.
The mouse is very comfortable to use, both in terms of button position and wrist support.
The only downside is that the mouse configuration program (Alienware Command Center for this mouse) is not as easy to find and does not have as many options as the one available for SteelSeries or Razer mice for example.