Give them a whirl...nice package.
First impressions:
1. Nice packing indeed. Very premium. Solid build,
2. Very comfortable. Haven't tried different tips, but stock installed ones work perfectly.
3. Sound: when I first played them, I thought they sound a bit congested and rather bloated. I then realized the noise cancelling was on and set to "airplane" mode, which seem to raise mid-bass. Turning everything off gives a much clearer presentation. Overall presentation is rather linear, quite conservative I'd say. I hear an airy but not sparkly top end, flattish mids, and a fairly linear bass end with a slight mid-bass hump. Technically, they have a fairly solid performance with a good sense of stage. Imaging and layering are what one would expect.
I'm not too familiar with TWS though I've owned recent ones by Sony, Senn, and Final. I'd say these are certainly in the upper tier. That said, they remain at the quality of TWS earphones. I would not classify the presentation as "audiophile." Compared to the $100 IE100 Pro, the latter are better in every respect. Someone earlier made a reference to IE900 above. You may prefer the tuning of the TWX9 in terms of being warmer as a matter of personal taste, but otherwise there's no correlation whatsoever between these models.
As TWS earphones, however, they're very good - I can see them being put to good use for general use; podcasts, music, films, etc.
