They fit really well, and I actually like the plastic housing since it makes them a bit lighter, and the transparent window is really neat! The nozzle is plastic too, so it shouldn't corrode like the brass one on the Moondrop Chu II. It was also a bit cheaper (though only by a couple dollars)!
The cable is slightly thicker than the Chu II's, which hopefully means it will tangle less often. I will continue to use it with my Fiio BTR11, IEMs with Bluetooth adapters is the best of both worlds in my opinion: longer lasting, cheaper, better audio quality, harder to lose like IEMs, and you can move around more and automatically switch between multiple devices like wireless earbuds
