Incredible disappointment. I'm new to this forum and I created an account solely for this reply. The mouse doesn't work with the software at all. It doesn't detect it apparently. Without the software it's locked to 125Hz, I think. Here --> http://i.imgur.com/WtqPmT0.png
The sensor also seems to randomly stop working ALL THE TIME. Look at this --> http://i.imgur.com/qBpBeFT.png
*** is wrong with the mouse! I'm consistent with the DA but when I try, and YES I'm trying, to draw spirals it buggers up somehow. I can't even explain this properly. It just acts so strangely. It also seems to have more smoothing than the DA but that's something I, personally, am not hindered by. Everything else about the mouse seems to be fine for the most part. The mouse feet are VERY noisey and the finish on the bottom of the mouse is very rough and horrible looking. It also has a cheapey-looking "Q.C Pass" sticker over the screw hole. Overall, not impressed AT ALL.