I got mine today and will give it a try and post more reviews soon.

The packaging is really neat and doesn't feel cheap. Especially like the rubberized case which let you to keep your Piston tidy without tangling the cable. The programmable volume up/down key seem to work with xiaomi phone only and doesn't work with my Nexus 4. Well at least the answer phone button still works. Might retire my SE215 with this since it has comes with a microphone too. Am not too particular with soundstage when traveling since I'm only listening to 320kbps mp3 on the move.