just received these. i now believe the hype.
out of the box, the BL-03's fit my ears perfectly fine with the stock tips and feel secure with the stock cable. before my purchase i was assuming i would have to buy tips and a cable for them, but honestly i think it's unnecessary. (YMMV, obviously.)
i'll spare you guys the word salad and just say that these might become my daily drivers. :) fit is comfortable, built quality is decent enough such that i think they could take a mild beating, and the sound is pretty darn impressive. dark and much less airy compared to KZ's offerings (KZ ZS10Pro's are one of my go-tos), but not overly bassy. overall clarity and bass extension in particular surprised me, frankly. not sure how well they will stand up to the busy-ness of melodic death metal (one of my preferred genres), but they absolutely sing with everything else i've thrown at them.
stupid good value. scoop 'em up.
nitpicks, if someone held a gun to my head:
--the cable is similar to stock KZ cables. won't win any beauty pageants, but perfectly serviceable.
--minor driver flex.
--would prefer a case over the baggie, but at this price point even the baggie is a bonus.
yeah, these are fantastic.