I got mine today and here's some quick thoughts juts based on an hour of listening. Maybe this has been answered already but I'm guessing these will respond well to some burn in? Has there been a perceived difference after 50 hrs or so?
Bass: Tight and punchy and responds well to EQ. It doesn't blend into the other frequencies at all and is really really nice,
Mids: Do seem to take a bit of a backseat, I think this may have more to do with a slight spike in some of the treble frequencies, for some mmusic they are beautiful but on songs where mid range isn't largely prevalent they do sound slightly recessed. When comparing the same song on my RE262's an immediate difference is heard in placement of vocals.
Treble: I do notice a slight spike, and before EQ'ing a little it does cause a little sibilance for me. I will say that when I put the comply 400 tips on it helped a lot, but it's still noticeable to me at times. It is super slight and not a deal breaker and I'm wondering with slight burn ion if they'll just disappear.
Imaging and soundstage do seem to be excellent. Compared to the RE262 which are nicely 3D but forward with their vocals the H100's seem to sound quite a bit larger and more expansive. Will give some more impressions later but so far I'm pretty happy with them, I think if the sound settles in a little after burn-in they'll be absolutely fantastic.