Bought these as demo's here in the Netherlands for 430 Euro (list price 595 Euro which is a bloody rip-off compared to the $495 they cost you in the US (= approx. 375 Euro).
 
What I like most of these is their live-like, open sound character. They are easy to drive which is great as they can be used directly with an ipod. However, you will not get to their full potential that way. Switching to a Cowon J3 was a big step forward in sound and using a better amp like the Rudistor RPX-100 will give you another boost, especially in the treble, which can sound a bit harsh without good amplification.
Bass is very solid and dry although it does not reach extremely low, mids and mid/treble are superb.
The overall sound is very coherent and I really like the (micro) dynamics and their resolution.
 
Only bummer was their listing comfort. I don't like pads pressing on my ears. So I upgraded them with the GS1000 pads. That did not only improve their listening comfort, it also improved significantly their spaceousness. A poor mans GS1000? Only drawback is that they need to be used now at higher volumes, which makes them a bit more leaky.
 
Anyway, with these pads it's a great sounding headphone for a reasonable price. With the GS1000 pads they have a great sound for the buck (especially when bought in the US)

Modified these to balance with silver/gold wiring and Furatec XLR plugs.
After a fairly long burn-in (>100hr) of the cabling and used on the Rudistor RPX-100 dual mono balanced solid state amp these sound very musical and dynamic. Much micro detail comes out and there is a good 3d stage imaging. The sound is very involving and intimate, providing foot-tapping and sometimes goose-bumps. Eargasm?
 
Definitely a step forward compared to the standard non-balanced version which did not impress me much.

Needed a good player for my FLAC and APE files (which my iPod could not do).
Bought this player on the various internet recommendations although its ridiculous expensive in Europe (239 Euro for 16G version).
It's a very good audio player in a nice looking package. It drives my RS2 very well and playes all files effortless with good dynamics and musicality. I like the added BBE equilizer settings, especially when playing at work on low volumes to get a bit fuller sound. Battery life is awesome and I love the OLED display although I guess I will not use video much.
 
User interface is ok, but not as nice a the iPod's, but that might be just me. I have big fingers and hands and the controls (on screen) and at the player are tiny. Changing the volume often causes me to switch off the player as that button is at the opposite of the housing.
When the battery was flat, I had some issues when I tried to start up the player. The software went instable and I had to use the reset button. Troubles luckely disappeared when the battery was charged again, so I guess this has something to do with the voltage drop of the near empty battery.
 
Bottomline is that I'm happy with my purchase and love the sound.