What can I say? After a few short week of intesive gaming this is the best gaming mouse I have have played. The other mice had their strengths, and I'm not saying this is the only mouse you should consider, but I do think it's the best. Why? I'll tell you.
First, this mouse is comfortable to use. My hand conforms to it naturally and I don't feel that any fingers are hanging free or gripping in any weird places. Apart from the traditional left, right, middle scroll wheel, there are two additional buttons for your thumb that do not feel misplaced. The construction of the mouse feels solid. Everything is big enough but not too big. It's subtly designed for a right hand (lefties won't work at all) and feels natural at it.
The software is pretty much what you expect: all the usual configuration options. It doesn't have an easy DPI switch button like the Ikari or Sidewinder, but its On-the-fly sensitivity is so easy to use that you don't really need it. One extra button under the scroll wheel might not have been unwelcome, but who can say?
The motion and tracking are absolutely flawless in this mouse. It's still as a rock at rest, goes in a straight line when it needs to, but doesn't interfere with any movements at all.
If you are looking at purchasing your first gaming mouse whatever the brand it will take several hours of gaming to get use to it. Stock mice usually have a DPI or around 400 unlike gaming mice which have a DPI of around 2000. This allows for tighter hand movement for a quick response on the screen but it take getting use to.
Combine this mouse with a mouse pad (more later) you will be on your way to several more hours of happy gaming.