Interesting review! Maybe a little too focused on the software but well written. One of the problems with these types of devices is that everyone seems to want them to duplicate a lot of the functions of their smart phones when the primary purpose of them is to be a high quality music source. Even my smart phone is pretty far from perfect. And if Samsung and Google with all their resources still put out devices and software with fairly major bugs, maybe we could cut Cayin a little more slack.
If the N5ii wasn't an android player with streaming capabilities, bluetooth etc, it would still be well worth it's asking price on based sound quality alone.
I can totally understand how software bugs could ruin your experience with it if you need all the additional bells and whistles and hopefully they can get the firmware sorted out to perfection within the next couple of revisions.
People just judging it based on what they read from this thread are possibly getting an unfair impression.
For my use as a basic high quality music player it has been nearly perfect aside from a very few minor glitches.