[ArcticViper]

You can't adjust how far the TrackIR software pans the camera relative to the motion of your head?

Yes, you can adjust the ratio of head movement on all axes, or at least that's how I experience my TrackIR.

At any rate, there are a variety of setups and it's completely customizable, so
It can obviously only track your head as long as it can "see" the track clip or the 3 reflective surfaces since it basically is nothing more than a camera that works in the infrared range of light.

Cheers
Arctic