Still got my DT 990 Pros (250 Ohms). Had em about 18 months so far and love them.
Only had one minor issue where the wire was detatching a little from the headphone but I've pushed it all the way back in and the used super glue to glue the outside of the wire along side the rubber which connects the headphone to the wire so it's rock solid and doesn't come out any more. A bit ghetto but there's no residue so you can't tell and it saved me a few bob from getting it re-wired.
Only had one minor issue where the wire was detatching a little from the headphone but I've pushed it all the way back in and the used super glue to glue the outside of the wire along side the rubber which connects the headphone to the wire so it's rock solid and doesn't come out any more. A bit ghetto but there's no residue so you can't tell and it saved me a few bob from getting it re-wired.