They sound and feel fantastic!  I've had in ear headphones before, mainly the ones that came with my Zune and my Samsung Galaxy bit I felt they were a bit lacking.

These are varnished beechwood and feel great and are a nice snug fit in my ears, and they look better than your average headphones too.  My poor quality MP3's sound nice (Only tried them with downloaded spotify tracks so far) but the bass is good, and the rest of the range is just right.
I'm sure when I've put a few hours through them they'll sound better too!
Tom Waits still sounds like an old record, Dead Prez are bassy and punchy, and Clutch are just plain awesome, although they would be awesome out of some chav's crap phone too.

I went back and got another pair for the wife

http://www.richersounds.com/product/headphones/vivanco/aircoustic-premium/viva-aircoustic