The first thing that happened when I tried this mouse was the DPI button sinking into the case when I tried to press it, necessitating retrieval with a toothpick. The buttons and wheel are all suitably quiet, no complaints there so far. Mouse seems very sensitive even at low DPI settings, I find it hard to perform precision movements with it at times. It's also quite slippery on a smooth mousemat - recommend the use of a textured mat with this mouse.
Overall, as a mouse it's fairly uninspiring, and seems to have some issues with build quality (and quality control, judging from other reviews here). It is quiet enough though, so can cautiously recommend it if that's your main concern.