Got my Dunu 3001 2 days back. From my limited time I have spent with them, I can say that SQ is awesome. Good Extension, texture and a wide soundstage for an iem. Treble emphasis is balanced without being sibilant or Harsh. I have tried them with Stock tip and had no discomfort. However, ergonomics and shell design could have been better. I hate the cable. It gets tangled so easily.