PROs: Seems well-made and solid; adds 2 waveforms to LFO and a new SIN wave to VCO1 above what the Jupiter 8 had, and expands the VCO range; adds a delay effect that Jupiter 8 didn't have and a step sequencer; it does sound good and is fun to play with. CONs: The sliders are very small and fiddly and they don't send or receive MIDI cc; the delay doesn't have dedicated controls so you will have to keep reaching for the "manual" for a while until you get used to setting that; step sequencer is very basic especially if you are used to the modulation possibilities available on Arturia's Jupiter 8V plugin; Sound is limited to 44.1khz 24 bit; using usb for power rather than a dedicated supply means you're tempted to keep it near your PC which seems silly because you could use a plugin instead; no arpeggiator (unless you count the step seq); no keyboard split; only 4 voice polyphonic.
Some sounds from the jp-08 are absolutely lovely, you can get punchy leads, really fat basses, some really lush, beautiful pads and of course some crazy sound effects. On the other hand the faders are really small which makes parameters like crossmod hard to get into the right place and there is a lot of stepping but when parameters like cutoff and pitch are assigned to envelopes and LFOs there is no recognisable stepping. The most annoying part for me was the 4 voice limitation, really annoying. If there were larger faders, 8 voices and an arpeggiator included it would be perfect for the price.