It only took me about fifteen minutes to become a TrackIR fanboi, back when I got my old TrackIR 3 Pro. I never had the dizzyness that some have experienced, luckily. I now have the TrackIR 5 with the LED-based TrackClip Pro, and I simply won't fly without it.
I do have both the "pause" and "re-center" functions mapped to buttons on my controllers, and use them often, especially when making long-range shots.
YMMV