Summary: Aside from a fast scroll option, this mouse seems to have most of what you would need. But I dislike it the more I use it. It has the singularly worst tracking I have ever experienced (short of an old ball mouse impacted with dust on its' tracking axis'). At first I assumed it was due to a switch from a laser mouse to an optical, but then recalled an old MS optical I had tracked fine, and a current Acer optical I just used worked fine.
Summary: Bought this as a replacement for my laser mouse. This thing sucks, it has so much trouble reading movement properly. It'll work fine for a bit, then suddenly the cursor starts jittering around or failing to read movement. This is both on my wooden desktop (which the laser mouse had no problem with) and a plain sheet of paper (I don't have a mouse pad, never needed one with the last mouse).
Pros: Easily adjustable dpi; comfortable in the hand; rubber side pads prevent slip
Summary: Just got it and have been using it for a day, i can honestly say the mouse is amazing, all functions are working, buttons and everything are perfect for gaming and normal using, the only prob for me is that i have been using a small mouse for a long time, so this will take some time to get use to.
Summary: The Gigabyte M6900 is a nice mouse to look at, fits well in the hand and the dpi buttons are a great feature to have at this price point. The mouse has so many issues that it is very hard to recommend however. For those who happen to have the right kind of mouse mat I'm sure it's a great mouse, as seen by other reviews but I've tried three and it hasn't worked well on any of them.
Excerpt: The elegantly designed GigaByte GM-M6900 Computer Mouse complements with the design and style of your computer system. This computer mouse is specially designed for your gaming purposes and it works to enhance your gaming performance. This wired computer mouse offers seamless connectivity and extended performance throughout.
Summary: Kurzbewertung: Maus kam bereits defekt an. Manchmal funktioniert es für kurze Zeit, meistens jedoch nicht. Durch Google hab ich erfahren dass es durchaus öfter bei der M6900 Reihe vorkommt. Ist also keine Ausnahme sondern tratt häufiger auf! Firmwares und co haben nichts bewirkt. Maus wurde an verschiedenen Computern getestet. Ansonsten eine sehr schicke und bequeme Maus. Echt schade!