I do have THREE Hifimans with me now - (He4xx, He400i, XS). I’m a modder too, so I keep tinkering with them - disassembling them and modifying them. I haven’t had any issues personally, despite going MacGyver on them quite a few times.
However, I have to respect the general sentiment - and that is that people DO have issues with QC.
I know it’s often a BET going with a Hifiman product, but I still take that bet. That’s just a personal thing, so each, to their own.
There always is a possibility of having issues - DOA on one side, crackling sounds, a sense of fragility, other dud problems… but you see, if you don’t get any of these issues with your product (the chances of which are decent, that you’re product is just fine), you hit the nail with a product many times lower than the competitor’s offerings.
Now remember, always take a plunge with Hifimans (at least the economically priced offerings) with some level or risk in mind. As they say, higher the risks, higher the returns. For more peace of mind, see if you can have warranties on what you’re buying. That’s the best insurance you can get. And after that - remember, Hifimans are not tanks. So take care of your gear (like I do) and it should last you a pretty while.
So, you get what you pay for - that’s the real bottom line.
You want much greater surety? You wanna play it safe? Well there’s always Audeze or DanClark Audio, or a couple of others yet in the planar headphones industry.
But are you still ready to take the risk, to save on some greens? Well, fair enough.