alt Hacker NewsI don't.
Hifiman QA is exceptionally bad, and they tend to not stand by their warranty, and their US repair facility is just some dude's house.
The threads on /r/headphones over Hifiman shafting them are numerous.
Disclaimer: I too had a Hifiman pair, they sounded great, but their physical design just didn't hold up to daily use, no matter how much I babied them.
That's probably true, they do look hard to repair.
My best sounding headphones are a pair of old Stax with the worst construction I've ever seen on anything, so I mostly keep them locked up assuming they'll break if I breathe in them.