The only drawback to TrackIR w/ FS2 is the fact that there's no in-cockpit reference. It's possible to add a cockpit, but it's not officially supported, so they're placeholders at best. I still use TrackIR regardless, it's better than nothin'.
"You know what the chain of command is? It's the chain I go get and beat you with 'til ya understand who's in ruttin' command here."
- Jayne Cobb, "Firefly"