I have just purchased a set to use with my little Nano when I'm at work. My logic was that the in line remote would be very useful (which it certainly is with the Nano) and the fact that they leak somewhat would ensure I hear people when they are shouting me. Previously I was using the excellent Shure e500's which isolate too much perhaps. I shall test this out on Sunday.
From a pure sound quality perspective, I have to agree with the others, they are remarkably likeable and inoffensive sounding headphones and are very comfortable and easy to insert - makes a refreshing change for someone who normally listens to Triple Fi 10's and the Shure's.
All in all, no buyer's remorse from me on these.