Just got mine the other day. Awesome compliment to my dt880s. They reproduce music very faithfully to the way it was recorded.
Theres a quickness with them that really separates sounds in a recording apart, like being able to hear the impact of a drumstick each time it strikes a cymbal.
The bass is heard rather than felt with these, it doesn't thump.
it sounded like there was an absence of low, sub bass once I first put these on. These needed a brain burn in for me. After a couple of minutes listening, I was able to hear that low bass and everything made sense.
The best way I can describe their sound is quick, airy, and articulate.
The build quality though! They feel so delicate! And the original eartips have to be replaced, they suck.