After two months of use...
A good quality product, the noise reduction works well and the sound is impeccable, whether using Bluetooth or the sound cable supplied.
One slight fault: there's no indication of the battery level, so you only know when it's empty, which means you have to recharge it, during which time the headphones are unusable, or with the sound cable. It's a pity, a small LED to indicate the imminent need to recharge or an audible indication that the headphones are 'talking' would have been welcome.
It's not possible to recharge the headset's battery at the same time as using it, as the position of the USB-C socket mechanically prevents the right earpiece from being positioned on the ear.
Volume control only works with Bluetooth, not with the sound cable.
To sum up, these are very good headphones, but with a very annoying flaw when they stop in the middle of a film and you don't want to make any noise.