I don't have TrackIR...but the owner of our fave local pizza shop loaned me his IR 4 set up for a month....took me a few days to get used to it....but man oh man what a difference it made in the "realism" factor for me. To be able to lean forward and get a closer look at my gauges, to be able to stick my head out of my cockpit and look down the side of my plane and beyond the high nose of tail draggers. I was very tempted to move to another state, take the IR system with me and not give the guy my new address. But honesty won out and I took it back to him....he offered to let me keep it longer but I told him that I would just get too attached to it and not want to give it back if I kept it longer.
OBIO