I only have had one problem with KZ and is not the first one I had issues with other brands* but we are buying low-cost IEMs in a highly competitive market so in the end so is to be expected. I'm brand agnostic and don't pay attention the the drama (there is plenty) I just check for a good return policy just in case.
*Rambling*
KZ with all the problems and bad reputation still is one of the most competitive (and innovative??) brands with really cheap IEMs that look well made and sound way above the asking price, in fact KZ, TRN, QKZ, Moondrop, 7Hz and other low-cost brands (or low cost products by usually more expensive brands) are one of the reasons I think that IEMs are solved thing, they can now manipulate the frequency response almost at will with incredibly low distortion, and while you still have costlier products with different technologies in my experience there is not much (if any) to be gained in my opinion it all comes down to frequency response (distortion to a lesser degree) and fit, fit as in how the design interact with your anatomy (HRTF/ear cannal), the engineers can make a best guess or use some kind of known average but in most cases (if not all) you'll have to try for yourself to check if it works for you.
*Sorry for the ramble*
For KZ or other 2 Pin brands I usually use after market (because I want a 3 button control/mic) 0.78mm cable with a QDC or 2pin termination, with no problems, I have never broken a connector.
Yes this time I can't deny it, I was on "break" from buying more of the dammed things but the graph cought my eye and then I saw the price ($7.69 for me with some AE "coins").
*brands much more expensive than KZ but still low-cost for what it is (+/-$200), and luckily all have been resolved with no so much trouble.
