Overall I am quite satisfied with this JU06-A, the sound is excellent and the build quality does not feel cheap - what I feared. 4 voices is not too few, but some might miss the 6 voices of the JUNO 60 & 106.
I am quite sad that the builtin audio interface does not work with Linux computers (Mac OS & Windows need a Roland driver). If this was class compliant USB it would have fit my setup perfectly, and I am sure it will for you too :)
Still, the MIDI USB works fine on Linux.