You have no issues with your R3??
Actually I do have an issue when using hiby r3 as transport for mojo. I'm using latest firmware and original hiby USB-COAX cable and it does drop quality of music a lot when I'm playing DSD. Mojo led is red - means signal is 44kHz and it sound is crappy.
That happens with all my DSD records. Even when I select play Native DSD. I could not get played WavPack (192/32bit) files at all. Seems that it is good for FLAC though.
Also it is pretty small and play\pause and next track button is not separated, hard to manage it blindly always skip track instead of pause. But overall build quality and software looks good for the price.
Anyway I already ordered ibasso dx200, will see how it will play.