Pros: Truly physical bass without distortion
Cons: Comfort, comfort, comfort
Bass - fantastic, clean, physical - I listen to a wide variety of music and the LCD-2 shined across the spectrum, but particularly stood out in bass heavy EDM.
Mids - natural and to my ears quite engaging.
Treble - slightly rolled off at the high end, but still engaging - for me this is a positive - harsh treble actively pains my ears.
For me a very high degree of goodness here ... except .. COMFORT
I have a small male head with largish 70mm ears. For me, I couldn't wear the LCD-2s for more than an hour without constantly adjusting them - even after bending the headband to reduce clamping force.
For me the issue seemed to be that they were large enough and heavy enough that they placed pressure on my head quite a distance from my ear, and this just did not work with my head topology.
These were my 1st truly high end audio headphones, and I thought that even at $995 they delivered value for money.
However .. that doesn't do me any good if I can't wear them.
That said, they were good enough I'm considering the LCD-3s, which have a similar signature but are generally regarded as more comfortable due to softer pads.