Regrettably, its extremely small size does lead to control problems. It's small enough to use on the palm rest of a notebook, and it fits into the snug pockets of a notebook carrying case, making it a viable traveling companion. It has the mandatory right and left buttons and a semitransparent plastic casing. Its optical technology allows for use on most surfaces, and no moving parts means no fear of mucking up the works. It's no secret that notebook touch pads and pointing sticks are less precise and less-easily manipulated than mice.
Trackball mice have the tendency to jump and skip and are useless on most surfaces.
This mouse successfully avoids these failings. The cursor's responsiveness to the mouse is a dream. The Optical Mouse produced smooth, fast cursor movements that were more accurate than movements produced by notebook controls. We did notice that some degree of control has been sacrificed for size, but then that's a typical problem found with notebook components. The average mouse is designed so that the hand rests comfortably.