I have just bought one of these mice and there is not other word for it than outstanding.
The appearance is very nice. A nice blend of black, grey and that blue colour as you can see in the image. It is very smooth and similar products of this shape are much more expensive.
Comfort seems fine to me. Never having used a mouse of this shape before, where your fingers are forced into positions, I was a bit unsure because I held my old mouse a bit weirdly. However, I got used to it within five minutes and the grips give added comfort. The wheel has a nice feel to and moves well. Just above your thumb is two little buttons for going back and forwards which I use a lot when surfing the net.
It moves like a charm, barely any friction between this and my mouse mat. It also has a nice little dpi button which basically changes your cursor speed although if you are specific then just go into mouse properties, the dpi button only uses two speeds.
A downside of this mouse is the wire. It uses usb which is fine with me, some people may have to sacrifice something else to make way for it. Wires are not a problem with me either, my old mouse was wired so I am used to it.
Overall, I find no faults for myself, some people may have them as I stated above. The price is to die for, £6.99 for a mouse of this quality is brilliant. Gaming with it is much better for me as well. If you want a cheap mouse for gaming that is good quality then buy this.
Well done to Gigabyte and thank you Play!