Hmmm... Let me guess. One, not all chinese IEMs are knock-offs, although these do look a lot like Sony's XBA-A3 and XBA-H3. Two, because the sound quality you get for the price is astounding, just look at the T2s. The Senfer don't fall too far behind, but they aren't as clean sounding. Three, not all are of terrible quality. The build quality on these is actually quite nice, unlike what's shown in the pictures (although the cable sucks, luckily it's replaceable). What sometimes suffers is the quality control of the more expensive brands. It's easier to get a dud that went past the checks. It's a risk that some are willing to take. But some companies, like KZ, are actually ok in that regard too. Also, I haven't seen may T2s have problems. These Senfers are quite problematic, but that doesn't throw shade on the category as a whole. There's a whole thread on Head-Fi dedicated to the so called chi-fi IEMs and there's a lot of them that are actually worth the trouble.