The wooden keys, the sounds and the piano editor functionality: this thing feels and handles amazingly.
The only thing that it could really use is more of the RD-2000 features such as the faders and less menu-heavy way to get into your sounds; then again, you pay less for this and it is more of a living-room piano.
If your aim is to play at home, and occasionally take it out for a spin - get this. If your aim is to play live and gig it often, pay a bit extra and get that RD-2000.