I got my CK88 yesterday. So far I like it, but I've only messed around a little here at home. I'll take it to a gig this Saturday.
The action is a bit stiff, but not bad stiff. I know, that's totally subjective. And yeah, it is pretty intuitive when you start fiddling with things.
Not impressed with the organ. It's nice to have the controls, but the sound is meh. That's really ok, since I didn't buy it for the organ.
One thing, though... the power cable to the wall wart is the thinnest, cheapest POS cable I've seen. Don't have a good feeling about how it's going to stand up to the rigors of gigging. If I'm going to keep the board, a spare power supply is in my future.