Isn the Orbita Mouse just like the Space Navigator?
No. Although the Orbita Mouse looks a little like the Space Navigator they are quite different. The Orbita Mouse is just like a normal mouse except that it can spin freely; whereas the Space Navigator is a little more like a joystick where the base stays in one place and the top is spring loaded, with a fixed range of movement in all directions. The Orbita can replace your day-to-day mouse and improve all of your tasks in general scrolling, media and more specialised applications like 3D. The Space Navigator is designed to be used in addition to your mouse, specifically for 3D tasks.