Itīs now my second week with TrackIr 4, and i simply love it. Itīs like the game has become more "3D" than before...
It was not as diffcult for me to get used to it as some other people wrote. I think itīs all about a proper setup of the hardware. I had to put some books under my display, so that the camera was finally sitting at an appropriate height for me (I am a bit taller than the average gamer
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Overall, the TrackIr gave me much improved situational awareness, and shooting was not more difficult than without it, thanks to the reflecting gun sight. Especially when my enemy flies scissors or similar maneuvers, i do not loose track of him as often as with hatviews or keyboard. But i had the first 2-3 days some problems in combat. While tracking the enemy i had at first not much feel for my plane, i even crashed a few times. But to use head movements is much more natural than using other devices, so i now have a quite good "feel" where i am looking in respect to the alignment & position of my plane. Looking around my seat/headrest is much easier than before. This is the point where i realised that AH2 has the best integration of TrackIr of all Sims. I tried it for example with CFS3 and it sucked completely
BUT - i have to say that i think its waaaaay to expensive. If you want a higher level of immersion hand have some money to burn - go for it. But it is clearly an item of luxury, you certainly do not need it to be a good pilot