The software allows you to customize things such as your double click speed, speed of your cursor movement, and the functions of all 5 buttons on the mouse. The nicest part of the software is in the buttons configuration tab. There is a picture of the mouse to the right of the drop down boxes. When you are at a certain drop down box, the picture on the right highlights the portion of the mouse that drop down box corresponds to. Initially, due to the bulk of this mouse, I was having a little bit of trouble grasping and controlling it.
Movement is very fluid and smooth.
Having no moving parts seem to slightly enhance my accuracy when I feel like playing sniper in Unreal Tournament. I definitely got a few extra headshots. However, the mouse needs to be close to the surface at all times. So when I turned a very fast in Quake or UT, the mouse would lift off a bit causing a bit of a jerk in my movement. I sure with some extra practice, this would eventually go away.