I replaced my Bose QC-25 wired set with this expecting to have better quality audio and the same other features I was having on my Bose set. I was quite thrilled when I heard the quality of audio and how well it does on noise cancellation. The app is not perfect but offers quite a wide range of high tech options and features.
However, I was quite disappointing to note it's below-par mic and Bluetooth performance.
Mic quality issues: Almost all of the recipients of the calls I made with this were complaining they couldn't hear me and the audio was muffled. I wasn't even in an area where there was a lot of background noise. Tried calling on my commute on the train and it was completely unusable and the other end couldn't understand a work I was speaking. Very disappointing.
Bluetooth issues: During calls and even listening to music, there are constant disruptions to the audio stream with pauses and audio fades which is really frustrating. My phone was only two feet away or inside my pocket.
Verdict: When someone buys a premium wireless headphone these days, one expects it to have really good mic performance (with good background noise reduction) and reliable Bluetooth streaming with zero interruptions. WH1000XM3B certainly does a great job in audio quality and ANC but had compromised the basic features of a standard Bluetooth headset.