Received them a couple of days ago now, don't quite feel ready to write a full on review yet, but... Damn. These really, really do something. Yesterday they just began to open up immensely. Pretty warm sounding to my ears, really smooth, although naturally depends on which points of comparison you relate to. My Sennheiser HD58x's sounded way too warm and bassy when I put them on for a moment after getting used to these. Upon initial listening, what struck me is that these sound very little like anything I've heard before, though notably I've never heard planar magnetics, electrostats or even particularly high end dynamic headphones before. One of my friends, who grew up listening to a lot of different audio systems, both speakers and headphones (none of which were planars or electrostats though), also noted that some things about the sound were difficult to describe accurately.
A weirdly fun thing about them is that if you put your hand even remotely close to the back of the ear cups, around 15-20cm or closer, you can hear the sound becoming distorted by the obstacle. Even though they don't sound insanely wide, they're definitely extremely open, even in comparison to my Sennheisers.
They feel like a very big step up from my Sennheisers though, honestly about the same leap in overall quality and enjoyability as I recall moving from my old HyperX cloud 2 headset to the previously mentioned.
It feels like that big of a difference to me.
Although I'm not usually comfortable spending big bucks like this on stuff, listening to these, I just can't help but feel that they're totally worth it. The sound is just so beautiful, and clear. As if the HD58x's weren't really good at imaging and separation already, these put them completely to shame. Plus, there's that nice warranty to help my heart feel a bit more at ease with the potential problems I might encounter down the line.
I had one of the tell-tale humming sounds in one of the ear cups when using them through my trusty Grace SDAC on two different laptops, but for some reason that doesn't occur at all when said DAC is plugged into my desktop PC. Thankfully, that one is my main system anyways. So far, they are dead silent when nothing is playing, as they should be. I've learned from all the different comments that electrostats are sensitive b0is, so I'm trying to take good care of mine to protect them from dust and other possible harmful factors.
I also honestly don't understand the people complaining about the build quality. Yeah, plastic, sure, but not brittle or poorly assembled plastic. They feel perfectly solid to me. The split volume knob is weird, but easily worked around.