This is a good mouse and generally works fine, but I would give it two criticisms. First, it feels like it is not as well made as the similar featured Logitec Mouses/Mice I have owned in the past. This is a minor issue and I have only had it for less than a week so perhaps it will actually prove to be of higher quality than it feels. Next, the scroll wheel is not a "free wheel". I was hoping that this mouse came with a wheel that you could click to put it in a "free wheel" mode wherein you could flick it to spin at high speed. I owned a logitec mouse 5 or so years ago that had that feature and I loved it. The scroll wheel on this mouse has a button near it that you can use to toggle between standard speed scrolling and a much faster speed scrolling. This design works pretty well, but I prefer the free wheel style so I am a bit disappointed. Other than these two issues, I think this mouse is great and worth the money.