Hi again
I have TrackIR. I actually did a lot of lobbying to get it in race sims years ago. I use it in rFactor and TDU (as well as flight sims). I got my first unit in 2001, I think it was. I have TIR 4 now. Couldn't get along without it.
I think for single screen gaming it works just great but once you add in the break in the screens and the slight misalignment between them it becomes disorienting as to what your trying to look at. If you had seemless gaps between monitors i'm guessing this wouldn't be a problem , but mine aren't perfect , coupled with the fish eye effect its much better just to have a wider fov thats fixed , and to move your head left and right to see the extremes than have the views slew around to meet you.
This is my experience only, if you find it better then good luck to you.