Composer more than full time for 17 years, I have these headphones for almost ten years. So it is a previous model and probably a good production at the time, judging by the comments made by users on the most recent fragility of the hoop.
I have absolutely never found an equivalent, even at prices much higher among colleagues much richer! I used several hundred hours (and I'm sure to be short of reality), no problem: always the same comfort, the same linearity in response, the same sound quality to the mix, the listening, or a fun night of classic piece thoroughly joysticks! The return of all frequencies is extremely linear at all volumes of plays, from the lowest to the most powerful, and transients are extraordinarily accurate.
I consider it a semi-closed headphones, not necessarily ideal recording booth: it envelops many ears, but the sound it produces is not locked, you can hear a little voice in decision-or flutes. Behind the console is the best headset I've ever used (although I recognize now be a little intoxicated, so I know him well!).
There, a few days, I have a little problem on the cable ... (Almost ten years after purchase!) That I will not replace this. This possibility is a must on this most excellent product. The proof is priceless argus, never resold once it has it!