I finally got mine on Thursday (I've been meaning to get one for a while now, only finally put the order in last week, shipping was quick). Listened to it for a few hours so far. I'm gonna give it more time, but its actually gotten a bit worse, it was smoother sounding right outta the box.
It easily bests the headphone out of the E-MU 0404 USB, and also is better than the jack on my Sony CD player (which has fared quite well and still does, but since its being fed from the CD player's DAC it loses out). Bass is definitely pronounced. I think it does a good job of showing you your source, which is good and bad (good source = good, bad source = bad). Soundstage is definitely bigger, but I'm not sure I like that. Its a little too open now, and vocals seem a little recessed. Separation is better.
Oh, this is with my modded W1000s. It definitely is powering them well, though it doesn't give you much play in the volume area.