The ONLY thing I don't like about TIR is that you can't use some of the gunsights in game with it (5in etc, tank sights, and irons on old models, as they don't have front sights to line up with). You can turn TrackIR off, but at this point I hate doing anything without it! Really sucks in the Ju88. (Actually this is more of a problem with Aces High II than TrackIR). However it makes using newer model iron sights really cool, since you have to line up the sights and hold your head still.