Summary: The thing is that I love Vortex, I do! I am a big fan and this is the reason that I got them 3 times in a year!
No, I am not using a different pair for each music-player-device but they got damaged extremely easy, you don't have to do anything than use them!
Pros: Design, bass, size, fit, sense of steel, potentials...
Cons: Durability, durability, durability. Oh, and cable and mic.
Summary: I actually had to return my pair as the microphone wasn't working on any device I used it with. I got mine half price (c. £35) and for this I got a very nice, clear, bright sound from the headphones. Great clean mids in particular.