I've never seen (in person) or tried TrackIR, but I assume it is more responsive than FreeTrack. However, since my flight time in AH doesn't warranty a triple digit expenditure, for the $25 I did fork over for FreeTrack, it was well work it. I love to mess with electronics (for being an novice) and especially mess with computers. Other than some construction swear words, I thoroughly enjoyed building my rig. I've probably have gotten close to 100 flight hours on the setup and it still works like it did the first day, even though I may be rough with it at times.