if at all possible go 10 bucks more and get the mx440 laser by logitech, i love this thing, it glides effortlessly even w/o a mousepad, the pads on the bottom of the mouse are hard yet "shock absorbing" and put plenty of space between the mouse and the mousepad/table, it has two side buttons that work in game, a 4 axis middle button (up down left and right) the middle also pushes down as a button, all of these can be setup as macro's to match your keyboard, it fits your hand perfectly and has served me well for gaming, internet surfing and hw for over a year! im sure you can find it cheaper than best buy, but here's the link for info...
http://www.bestbuy.com/site/olspage...ategoryId=pcmcat107700050023&id=1138087111859
http://www.bestbuy.com/site/olspage...ategoryId=pcmcat107700050023&id=1138087111859