Summary: Quality mouse, I'm very impressed with this purchase. Perfect for gaming, loads of sensitivity and it just glides across the mousepad. The supplied weights are more than sufficient and stuffing them all in gives the owner a reassuringly heavy mouse. Minimal pinky drag and fantastic comfort + ergonomics. Only problems I had were some firmware bugs (on win 7 64bit), nothing too major and no hindrance at all.
Summary: I really liked this mouse, not as much as I thought I would though. The ergonomics were good, but just not a perfect fit for my hand. The feel of it got better as time went on, but never to the point of absolutely loving it. I have small hands, and maybe that was my problem.
Pros: - nice looking mouse, - good illumination, - ergonomics