Likewise, no expert, but I haven’t noticed any issues with noise cancellation.
I have found the sound quality, along with the fit, entirely non fatiguing.
I was worried about the codec used, but with MacOS and Android I haven’t noticed any quality issue. There may be latency issues, at least with MacOS.
I have also had some weird connection issue, only with MacOS, where it very rarely disconnects and then reconnects.
Overall I am very happy with them, one of the most rewarding purchases in a long time. My partner is annoyed with how much time they’re on my head (something that would be way too painful with my Sennheisers), because despite the ability to cover the right side to enable ambient sound, that doesn’t exactly appear social!