I just bought these in a moment of madness for 180€ on Amazon during Black Friday. I searched around the internet and it seems these are still not very well known, maybe because the price is outrageous and everyone is still using their old 598. Anyway, my first impressions after a few hours of listening are very positive, these impressed me from the first listening session unlike the old 598 and the closed 598. Compared to the old 598 these have a more lively sound, the bass is very nice on these, while on the old 598 the bass was definitely lacking, also, these don't seem to have any "veil" compared to the old ones where, imo, everything sounded a bit distant and veiled. I think the sound of these is very immersive and very detailed, they're definitely a bit more detailed than the 598CS that I still have, the sound is less compressed and a bit less fatiguing considering how smooth they are, and of course being open they are, well, more open and airy. Even with no burn in whatsoever I can't find any complaint, these just sound smooth and comfortable, with the right amount of bass compared to the older ones and unlike the 598CS the mids are not aggressive and fatiguing. Everything sounds good on these, from classical to trance, even if the bass seems to be lacking in some electronic tracks I like, they make up for it in sheer clarity and immersiveness of the sound. I don't even have any amp or anything, just listening to them straight out of my phone and computer, the volume is basically the same as the 598CS, that is, dangerously high. I'm liking them very much but I don't think they're worth the massive amount of money compared to the old 598 or the 598CS which costs literally half the price while on sale, but anyway, I think that with these, Sennheiser perfected the already likeable 598 signature sound. Anyone else having them? What do you think? Did they change with burn-in?