Great features (see http://www.roland.com/products/en/RD-170/specs.html)
"samples' world : be scary!!!"
Yes, it has all the features we are trying to reproduce : realtime sympathetic resonance, continuous sustain pedal (half pedal), soft pedal, with a great keyboard.
Sure, internal piano samples are not as great as the PMI or Worra sampled ones, but overall playability is very great.
As master keyboard, the RD170 is not as sophisticated as a kurzweil PC88, but it is really interesting yet.