A lot of ex-EX-71 users here I see
I purchased a set a year and a half ago. After four months, the right plug stopped working. The store gave me a new set. Four months later... whaddayaknow... right plug stops working again. I was so fed up, I didn't even try to get them replaced again.
That's a 45 Euro set of headphones, which breaks after four goddamn months. Well fuck that.
I bought a set of Shure E2C's last year, and they work perfectly and sound just a bit better. They're slightly awkward and a bit less comfortable, but at least they don't break every four months!!