Optical finger sensor

There are two thumbpads that flank the far right and left of the controller. The right pad also includes a touch-sensitive surface (Sony calls it the optical finger sensor, or OFS), so you can control a cursor onscreen (like a mouse), which is needed for Google TV's browser-centric design. It's a decent idea, except the cursor control is imprecise, which gets really tiresome when you're trying to click on, say, a specific link on a Web page. We opted to use the left pad for navigating through menus whenever we could, but we still got stuck using the touch-sensitive pad more than we'd like.