Track IR will take getting used to. At first, it's remarkably difficult to accustom your brain to something it's simply not used to; completely unnatural head and eye movements. However, once you do start to find that groove, you'll wonder how you, or anyone ever flew FS without it.
You won't even think to use that hatswitch, once used to it, TJ. The rotational aspect of Track IR is the hardest part at first. To look 90 degrees to the right or left, you instinctively rotate your head almost 90 degrees to said direction. With Track IR, you only need rotate your head 5-30 degrees, depending on how far to the left, right or back you wish to look. It's really screwy with your mind at first, but you'll get used to and love it.
My few Track IR hints are these, and they really made vs. breaking my TIR experience:
First, set spacebar in Track IR to be your TIR pause button; invaluable when adjusting some VC item like engine settings or radio frequencies. The space bar because it's a big, easy to find button during that moment when you need to pause Track IR immediately.
Second, finding and setting your eyepoint to a comfortable and default location will be key. Do this by hitting the pause key while in the sim (space bar if you do set it up that way), and then relax to your comfortable flying position in your chair and rotate your head up just a tad. Then hit F12 to reset Track IR's tracking. Then un-pause and you'll have a nice default eyepoint; the looking slightly up while calibrating Track IR is a personal preference that allows for better panel viewing, instead of having to tilt my head down a degree or two all the time.
Third, fine tuning the actual response limits and times in Track IR's interface will take a bit of time, too. However, once you've figured out how it adjusts and responds, you'll be able to really tweak it.
The point looming on the horizon of my long winded post, is to stick with it. Track IR almost ended my FS career because I was so frustrated with it for the first few weeks. I went online and read around, and found some useful tips, and it has since transformed my FS experience permanently. I can not sim fly without it ever again. I hope my Track IR 4 never craps out (knock on wood), because it means going and getting another one if I still want to fly FS. :ernae:
EDIT: One more tip: If you ever sneeze or something like that and totally screw your eyepoint up, just snap your head backwards and back to your regular head position. This usually resets the tracking. Believe me, the first time you really sneeze while using Track IR, you'll know what I'm talking about. :ernae: