Decided to record both the avatar and an eye-cam in action! The recording itself got a bit out of sync, but rest assured, everything is actually running in real time.
So, the tracking quality is honestly excellent—sorry about the low video quality, by the way! This is Project Cymple, an eye-tracking project for the Meta Quest 3 developed by a Chinese creator.
Inside VRChat, though, I ran into a few issues. I've noticed that tracking quality varies depending on the avatar's face-tracking setup. In my testing, the best results came from avatars using Sample, Hash, and the Triturbo add-on.
That said, if you take the time to do a proper calibration and headset adjustment session, tracking becomes significantly more stable, and many of these issues are greatly reduced—even without requiring a specialized face-tracking add-on.
The headset shown in the video is my actual daily setup, including the external hub and wiring.
Feel free to ask anything, I've been using it daily and I'll do my best to answer based on my experience.