Here is a trailer of Turner's videos
https://www.youtube.com/watch?v=l_WY0igAPKk&list=UUbhZmnzZ4BbHg7-O40DsrSA
Track IR is worth every penny IMO. It takes a couple of hours to get used to but frees up so much of your Stick fro other purposes:IE Trim settings on your hat switch instead of view directions.
You do want to bind Pause and Reset to keys or buttons on your stick. Pause obviously pauses Track IR. Reset will Reset your centered view to your current Real life head Position very helpful if you have a crappy game chair like me that slowly lowers its self over time.
Optionally, instead of pausing it, you can add in a bit of deadband when it's centered so you don't have to have your head in exactly the same spot to return to center, just moderately close. I've got about a golfball sized bit of deadband in all directions so when I return my head to center I have some leeway where I can wiggle a bit and not have the view move. This negates the need to turn it off for me.
Everybody's different though, and head tracking is the single most personal setting you can have on your computer IMO. Some people have settings I couldn't work with at all, and many likely would hate my setup. If you get it, take the time to fiddle with the motion curves until it's working exactly how you want it to, don't be afraid to tweak it. Once you've got it tweaked to where you like it, then start trying to fly with it.
Zoom works just fine with it.
Wiley.