It has three major bugs on the 5314 firmware and one major bug on the 5515 firmware.
5314 Bugs:
Regularly asks to re-pair the bluetooth to the phone despite being done and showing on both devices as saved (you just hit yes and confirm pin and that's it).
Android auto works well, but using any bluetooth audio device (calling the assistant with the voice control button on the wheel, or on the head unit) or a phone call, afterwards you'll have very flat audio, bass/treble missing, you need to hit media key and back to app to reset the mixer (which is annoying when driving).
Third and finally, the sound mixer regularly forgets the audio settings for calls, music, radio, navigation. So you're constantly fighting the mixer changing them up and down when they happen.
5515 fixed most if not all of this, but introduced a bug where all phone calls have a perfect feedback loop to the caller so they hear themselves clearly - essentially show stopping so I rolled back to 5134.
