You can play keyboard parts on this if you don't have space for a real piano, Rhodes or Wurli. It makes a fine midi controller too. The action is very good and fairly realistic. The key weight is a tad too heavy, but it keeps my hands strong if I practice. Otherwise its fatiguing, but that's my fault for slacking off on piano, now isn't it? Stock Piano sounds are reasonable, electric piano 1 sounds like my DX7 (ugh), but electric piano 2 sounds a lot like a Wurlitzer or Hohner and I find myself writing a lot of music with that sound late at night. The organ sounds are hideous, strings are comical, harpsichords are fun as is the sampled vibraphone. I wish one of the harpsichord sounds was a sampled Baldwin electric so I could pound out "for your love" by the yard birds late at night after I've had one too many.
I was very impressed the first time I played with this Piano (which later lead me to buy it) because of the softness of the keys. It's very comfortable to play with, it has a clean design (barely no buttons at all) and at the same time it has an incredible compatibility for MIDI effects and effects. I recorded my first album with it, including piano tracks, strings and many more.