WWWEEEEEELLLLLLLL............
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When I first used it the stock/default settings were.........
Even thought about putting it up for sale!
BUT I ENDEAVORED to PERSEVERE (really enjoyed the Outlaw Josey Wales, I am part AmerInd, and I'm gettin old, keep thinkin same gal will become convinced that I'm a chief

)
Found that the best way to use trackir is with aggressive settings!
More view movement with LESS head movment! With a small dead zone for front/aiming.
Also looking to your 6 is ODD at first! just turn your head left or right until you see your seat headrest THEN LEAN then ?opposite? way to view your 6.......... works well but take awhile to get used to.
Others use even MORE aggressive settings then I.
Be warned nearly any strong light or reflective surface BEHIND you WILL at one time or another create PROBLEMS!
The darker it is behind you (read here inline with the trackir pickup unit) the better.
I invested in the 3 led unit and am so far very pleased with the result, BUT take into consideration the above statements PLEASE!