I just received my pair without about 6 hrs of burn in. These are so far my favorite headphones I have tried out of the UE 6000, m-50, fidelio l1, hd25, klipsh image one, yamaha pro 300, beats, and denon 2000.
The tremble is simply amazing, Its very crystal clear and detailed. Vocals sound so rich and smooth- and extremely accurate. Bass is alright, not boomy at all.
Something I did notice is the music feels like its coming into my ears from each side of my head. it doesnt sound like the band is playing in front of me. I also find I need to turn the tremble reducing setting on in itunes to get the desired sound I want.