Pros: Comfortable, sensitivity adjustment works alright.

Cons: Scroll wheel is completely useless.

Overall Review: I bought this mouse on a whim, and now wish that I hadn't. I don't normally write reviews, but if I can keep even one person from having the same terrible experience as I did, that's great. Most of the components of the mouse work well enough, but the scroll wheel is completely and utterly useless. It worked fine for a day or so, then slowly but surely it started makeing any page that you attempt to peruse jump up and down erratically, and trying to "click" the scroll wheel to, say, open a new tab in Chrome, the same erratic jumping would occur. Now it's to the point where I can't use the wheel at all for anything. Rather wish I could return this hunk of garbage now, but I'm afraid I'm gonna have to chalk this one up as a loss.