I just downloaded the demo. I constitute notice to the user who finds the sound means. I think the tester was under a little inflamed!
Indeed nothing to celebrate. The result is correct for synthesis but yet does not compete with the best instruments sampled. I do not give a reference but the tenors are already known.
One more effort and piano Pianoteq may be able to take a leadership position. In any case, playing the piano alone, not embedded in a mix, seems a bit "bloated".