I received the Colibri - sounds good but I have some operational issues with it:
If I rurn the Colibri off/on its not detected on my devices - i have to unplug/plug the usb, sometimes I have to turn off and on again the colibri and even then it's not detected, then i plug unplug the cables from the source and do a rain dance - it starts working eventually, sometimes randomly.
Sometimes upon connecting the USB and playing music first time it does a huge pop, almost deafening me (even with HD800S) - I'm always scared when plugging it in so I started taking off my headphones - this is a big problem for me. Tested on Macbook Pro with Roon and Android device. None of my many other sources do this.
It randomly cuts out and continues playing music every couple minutes or so on Roon. None of my other sources do this.
I don't know if there is a new firmware for it - will check. These issues really need to be ironed out asap, one of which is a hearing safety issue.