Alright, received the Mu7 today. Initial impression is that the build quality appears to be excellent. It's a mostly metal construction.
Comfort is good as well. Ear cups measure at 62x38mm and 25mm deep (measured with calipers, so these are precise measurements). Ear cups are egg shaped, so the bottom is much narrower than the top. Earpads are soft but don't compress too much, aiding in keeping the drivers away from your ears. Clamping force is about average (Bathys is probably a bit stronger). Will have more comfort impressions after I spend more time with these.
ANC is decent. It's better than the Focal Bathys, but not as good as the Sony XM4. Tested this with basic white noise. It has ANC On, ANC Smart (probably some adaptive form), and ANC off. No transparency mode as far as I can tell.
SQ: nothing sounds off right away, so that's good. Will need to spend more time regarding listening impression, but overall fairly neutralish.
There doesn't appear to be a companion app, but Bluetooth pairing worked on the first try. Easy.
This also supports fully passive wired listening (no need to turn them on, but you can if you want ANC). This will be good when the battery eventually dies.