Quote - Another thing to keep in mind about the Space Navigator is that it is not a mouse replacement. The mouse is still being used to select things with one hand while the other hand moves the Navigator around inside the preview window.

Amazon has pics of both the Navigator and a traditional mouse being used in tandem.  Being able to move freely within a 3D space, while doing the actual posing and other work with a regular mouse, strongly appeals to me.  I just wanted to make sure the Navigator really works and isn't just another gadget to waste money on.