Summary: I bought this mouse for its comfortable shape, the extra 2 thumb buttons for gaming (but also function as backwards/forwards buttons whilst navigating browsers etc), and the fact that it's wired (i hate messing around with wireless connections and batteries) and I'm not disappointed.
Pros: Got one of these in June 2012 to replace a mouse with a busted scroll wheel. It's been fantastic. Responsive, comfortable to hold (even if you have big hands like me). The DPI button is something I haven't really seen a need for, but that's fine since it's basically gravy. I liked it so much that when I ordered a new laptop in 2013, I ordered this with it.
Cons: The only problem I've had is accidentally bumping the DPI button, but that's a pretty rare occurence.
Summary: Overall, the mouse is a great buy for casual gamers or multimedia students, however, I would not recommend this to hardcore gamers or individuals that would like to use the mouse for hours at a time.
Pros: Cheap Price, Good fit for large hands, DPI switch, Back & Forward buttons
Cons: Not enough room for scroll wheel, sometimes gets stuck, Surface tends to collect sweat and oils quickly, Clicking the middle mouse button to sometimes scroll, Stiff connection wire, tends to hold its folded shape
Summary: Bout at 10$. Used to have an old razr with my laptop but it finnaly died. As i sometime game with it i cant go with a small mouse. This is do the job, grippy with the rubber and is quite comfortable. would recommand to anyone.