I have no issues with any high res file playback so far. That side of things seems fine over here. All the major kinks AFAIK have been ironed out.
Please note, the streamer is in a Pi module and so, like every other computer in the world, you will need to power cycle it from time to time to put the wheels back on.
If you are considering getting the BDA-3.14, understand also that you will need to feed it internet via an ethernet connection to use the streamer as the OS is located online. You will also need a second ethernet connection to make certain adjustments to the system, inputs etc, especially when you first get the DAC. If your modem is close to where you want to put it, no problem. I bought a small wifi mesh system.