Instruct: Classify a given review as either positive or negative.
Query: Horrible scroll wheel

Like others have mentioned, the scroll wheel on this mouse does not function properly, even when you install the Kensington software and even with a fresh set of batteries, and even when the USB receiver is right next to the mouse. The scroll wheel does not move up and down incrementally but jumps randomly or not at all. It is horrible.Otherwise, this would have been a great mouse since is the pointing and clicking works fine and the rubberized sides make it very comfortable.