Interesting to see how you get on with yours.
I like the keybed on mine.
Not so much the lack of quality with all the buttons, and sliders where presently the on/off button at the back of mine needs to be changed. It is hit and miss about powering on and can just cut out.
When I boot it it goes to the default piano, it started OK when I first bought it but now it is all distorted, I have to swap patch’s and swap back and it is then OK.
The OS is dire, the software available does work pretty well but of course that requires the laptop being powered on as well.
As my buy of the C2 was a spur of the moment thing from Anderton’s, and hence sight unseen and unplayed, I took a chance.