Agree fully, if you intend to use them as headphones and occasional telephone calls. They don't seem to be made for allround headset usage (like Jabra Evolve2 85 or Bose 700). "This unit supports normal incoming calls only. Calling apps for smartphones and computers are not supported." I also...

Yes, it's called "sidetone": https://helpguide.sony.net/mdr/wh1000xm4/v1/en/contents/TP0002752838.html But I don't think you can adjust the level of it (how much). The microphones are OK, but not great.

Got a reply from Sony support that this is unsupported usage, refering to "This unit supports normal incoming calls only. Calling apps for smartphones and computers are not supported." in the fine print...

I may have encountered a bug with the XM4:s. When I use the headphones to a connected to a Windows 10 using the headset profile (meetings) I cannot change the volume with the touch control. Of course it works when they are connected as headphones and in calls with a mobile phone. Easiest way to...