Hmm, I bought these Earbuds when they came out.
It’s a nice set, however, some annoying setbacks for me:

- Battery life no where NEAR 20hrs. More like 10. Had to change them during a flight from Osaka–>Tokyo–>Amsterdam with a 1 hour stop in Tokyo. (Total flight time, 14hrs).

- It does not have a sound pass-through function, so, battery empty == no more noise from the buds. The older analogue Sony ones, had audio pass-through so you could still enjoy sound without NC.

- No manual setting on NC modes.

- Does NOT filter 98.4% of ALL noise, just the monotonous sounds like trains and engines so you hear the JAL stewardess saying Sumimassen more clearly through your ear buds then ever.

- All audio is digitised and then put through to your ears. Never mind recording in Lossless to our Personal Audio Device any more, the throughput sounds like 320k mp3.

- Using an equaliser on your PAD ruins the throughput sound.

- Your PAD had better have a pretty high volume output to get a decent volume dumped in your ear canal without having to have the NC300D at full volume.

Is this a bad set of kit? No, it’s not.
Does it do everything they say it does? No it doesn’t.