[JCBigler]

I've tried a couple different ones, including the Waves NX.

It's certainly cool and makes working on headphone much easier (easier to listen to) if you have to spend lots of time on them. But I don't think it actually helps you make a better mix, it's just easier to listen to. But I usually turn the head tracking feature off since I don't want it to track all my head movements all the time.

Things might be different if you are working on a truly immersive mix, such as Atmos, or one of the live sound immersive formats like L-ISA Studio from L-Acoustics and use their binaural rendering option with their in-ear-monitors.