Good ergonomics, excellent touch screen, touch keyboard okay
Easy to use, fairly intuitive at first, but if you want to dig a little and do the modeling, it becomes cotton.
The effects are very good.

UTILIZATION

Editing sounds not bad, but still a bit heavy in spite of the large touchscreen.
Arpégiatteurs impeccable.
The manual is fairly complete and well done for.

SOUNDS

The sounds are pretty standard but MUST THE (OPTIONAL) MOSS IS THE CARD: A MUST! (But expensive).
It is the sound card that I use as Moss.
While in the line of Korg, ie for sounds "synthetic" is very good, but the piano or guitar is still low, each his specialty ....

OVERALL OPINION

I have 2 years and I can not get enough (especially sound card MOSS)
Thank God for the touch screen, if not with the range of possibilities it would be impossible to cope. A good ergonomic level.
Price / quality ratio correct (except the map MOSS: too expensive)
MIDI implementation impeccable.