Good reduction, but not a "cancellation" ...

Fit is very good and comfortable.
Battery Lifetime Goodenough for my flights with 9-12h.
Artificial woop woop-woop-in S-Bahn / local train, very annoying and loud Relatively. This could be an odd superposition / interference of the real noise with the anti-waves.
Diesel engines on buses CAN Still Be Heard Wonderfully, same with high pitch of brakes, meaning there is hardly any reduction for any higher frequency noise.
Same on the ice, at high speed, only the low frequency part of the background is noisy canceled, the higher part is quietly very present.
In the end, it matters where you come from: if you take the headset off (taking away the mechanical and the acuoustic / electronic reducion), you think wow, what it comparatively quiet before. If you come from a really silent place and you would be exposed to what remains after the reduction (eg on a plane of train), you would think wow, this is really loud
After I have had them now for three months, I can say That I went from wow to at Increasing disappointment. I would now probably go for high quality earplugs, like HEAROS. I just tested them again on the train, and my impression is in fact They They filter out more noise then Bose does. But then, it is much more difficult to get them in and out again Quickly, like for a ticket control.
After a few more long distance flights, I value them for being able to listen to music or meditation that helps my sleep, Which I could not do with the HEAROS.