Amazing, well worth it.
I have Westone W30s, Massdrop Universals, ikko OH1, UERRs.
I like to produce, mix, and do FOH/Monitors for live events.
None of them compare to these when it comes to price & the music quality + enjoyment out of these. Subs are just extremely rich yet not overpowering.
That being said, these are a bridge between music enjoyment + reference monitoring. DO NOT use these if you're a mixer, or you're looking for a true reference to what you are listening to. These are for enjoyment.
Sealing could be better, but with the need to displace air with 1DD what can you do.
If you're looking for a cheaper and better Beats or Bose, or dare I say Sennheiser, this is a well worth investment.
Would recommend to a friend.