I thought there would be more praise in this thread already :)
Everything that follows is my own impression, of course. But it's a strong impression. The new piano is incredible. I tried a few factory presets so far, and here's a few more specific observations based on "player" preset.
1) It gives a feeling of the piano rather than the grand piano, somehow. I'm comparing to the Vienna Imperial, where every sound is indeed "grand". See the disclaimer above. I'd describe the sound as "fluid", probably because of this new release samples technology. Certain "ringing" quality of some Vienna IMperial rekease samples is also not noticeable, at least on the low velocity notes, where it was apparent.
2) I didn´t notice the "usual" noticeable resonance at 200-250 Hz, which is present in Vienna Imperial "close mic" patches and often requires EQ-ing. Everything sounds just perfect with no extra effort on my part. I auditioned every mic separately.
3) One definitely needs SSD for this beast (this was mentioned already, just emphasizing). The number of samples just overwhelms my poor hard drive. Need to re-structure the files.
4) The player software is ok, but not flawless at the moment. For example, I experienced rather loud glitches sometimes (one time outf 20, roughly) when I was stopping playback (I'm on Cubase). Must be something with those release samples, again.
Verdict: for the price it's quite phenomenal. Well, It's phenomenal without its price, just adding that as an argument.