For what it's worth, I have decided to return my pair of 1000x. The squeaking is getting annoying and frankly I think it has got worse since I first notice them last week, now I hear them every time I move my jaw.
As a noise cancellation headphone, I think its ANC is superb and far ahead of my B&O H9, it manages to cancel out most of the train/bus noise even when no music is playing and human voices are mostly muffled as well. I find the ambient/voice mode a little gimmicky, I don't use them, though the cupping your hand over the right earcup to hear ambient noise is kinda helpful, if a little awkward. I don't think the mode where it supposedly better adjust its noise cancellation based on your head/ear shape actually do anything much, I don't hear much difference before and after, but then as mentioned, the ANC is already very good to begin with. Touch control is far better than my H9 as well, while the H9's touchpad is unreliable to the point that I mostly control music through my phone, the 1000x is reliable enough for me to control music using its touchpad. That said, physical buttons are still much preferred for me - I still get a few unwanted touches on the 1000x, though nothing catastrophic like redialing my last called number like on my H9.
As for sound quality, I must say again these really are not even close to the P7 Wireless(in fact I don't think any ANC headphones currently in the market are), and it is not just a matter of sound signature, the P7 Wireless just betters the 1000x in every category, bass is more impactful without bleeding into mids, vocals sound sounds fuller/more emotional, highs are more extended without being harsh, details are easier to pickup, separation is better, etc. Let's just say that while I think I can live without my desktop setup with just my P7 Wireless, I don't think I will be as happy if I am stuck with the 1000x, it is just an all round more enjoyable listen on the P7 Wireless.
Anyway, I would have considered keeping mine for use as a travel headphones if it wasn't for the creaking, these tick alot of boxes for a travel headphones.