The main selling point of the VPC1 is the RM3 Grand II wooden-key keyboard action for a good reason. The keybed is unlike anything I've ever played, it's the closest to a real grand I've ever felt. I highly recommend this keyboard for pianists.
The build quality is fairly good. The keyboard feels sturdy and well built, but not without flaws. One of the keys on my unit makes a undesirable noise when pressed (however this dosen't affect funcitionality). Also worth pointing out is that the foot controller simply stopped working after 3 months of use, don't know if this is a trend or just a random case of a faulty unit.
Feature wise Vpc1 is very limited. A pitch- and mod-wheel would have made it much more usable, and a flat top instead of the current curved one would have solved a number of issues related to the huge size of it.