Ok, just got mine, quick impressions. (with iphone 3G)
These are indeed really small, good looking, and comfort is amazing.
As for the sound... As others said already, the sound is pretty balanced with very forward mids, therefore these are great for pop/classic/acoustic music.
Now I let my taste come in so Im not gonna be objective.
As a result of the mids being so forward, sound stage feels really narrow.
Also, these wont go very low nor very high (bass and treble), bass isnt strong, its pretty neutral... but trying to amplify it with EQ caused some distortion.
As for mids, very forward but doesn't sound alive enough in heavy guitar solos and in some other parts too.
overall, i find the sound pretty boring, not lively enough for me...
These do sound amazing with artists like Kate Nash, Michelle Branch and many other pop artists, but thats just a small part of my playlist so its just not enough for me.
My bottom line: Great IEM's, good SQ, but not my taste...
I wouldn't recommend these for heavy metal/dance music.
Im not disappointed, I knew what sound signature Im gonna get and Im sure I will enjoy these but thats not enough to be my primary IEM's
My main IEM's will stay my modded sony ex51 for now, maybe I'll try Nuforce in the future.