hien34Amazon JP has some reviews - my beginner Japanese + AI translation:
Great bass and actually surprisingly good treble
Can turn on/off bass boost on the IEMs directly (so that's nice for DAP users)
Good battery life
Noise pass-through is OK, but can still be hard to hear someone speaking without removing (like when checking out at a store) or also lowering the music volume
Not for jogging/moving about - some users complained they don't hold strongly enough in-ear for such a large/heavy IEM
Mic is OK but picks up surrounding noise
Some instances where the left earbud failed or failed to charge (flaw?) and had to replace