Here's a lesson as to why you should never trust first impressions, and because these are so cheap, just buy them yourselves. Over the past week (even though I had an ear injury unrelated to IEM's) ZS6's have greatly improved. They sound like the ZS5v1's with a bit of a harsh high end. Over time your brain/ears adjust to it and while it still stays very prevalent, it does tone itself down. I find that it's a very narrow frequency range that really pings the ears, and some songs you have to turn down. $40 for this is worth it for the shells alone. I'll give a more detailed review later, but my ear still hasn't fully recovered.