I have one. Here are my thoughts:
Good gaming mouse, not as great for office work.
This replaced my Ideazon Reaper, mostly since it had a much lower dpi rating. The Razer's on-the-fly sensitivity adjustment is a useful feature. However, the top plastic is flimsy, the edges are uncomfortably sharp, and the primary buttons will register a single-click as a double-click, which isn't an issue while gambling, it can be quite a headache during office work, especially document editing or switching between layered windows.