Great on-board sequencer. Would have rated it a 10 if it had 128 voices. 10 Almost all sounds are excellent. Plucked guitars are really good. Techno and synth sounds are excellent.
Effects are great.
I heard different stories from different techs. However, I'm waiting for Korg's next entry into this market. I'm hoping they make an instrument with TRUE 128 voice polyphony. Patch editing very easy. People who have only used Roland kit for example will struggle at first.