This post has a photo of my HiFiMan (HFM) HE-560 driver after it cracked all over and
died as well as a stock photo of a fresh driver:
The good/functional driver had as many cracks and looked almost the same, but didn’t have the circuit-breaking crater (lower left edge).
If you read the HE-560 thread, many or most users had issues with the product. In lasting 18 months, @pwjazz said mine were age 70 in Sennheiser years. And my HE-560s were not the first/worst generation with plastic yokes – that version would cry and stop working out of spite if you looked at it funny.
My takeaway is that the same thing that makes HFM products unique (i.e., delicate, airy sound) is the same thing that makes them fail quickly. They rely on fine, thin, electric circuits that constantly vibrate in use. This is fighting an uphill battle, as heat and constant flexing lead to work-hardening and cracks. I replaced my HE-560s with the Focal Clear and never looked back. Given the technology and proven reliability issues with HFM, I’d personally never spend more than $200 to $300 on any of their products and also assume they would fail (i.e., usable only during the warranty period).