A bit more information on piano samples/modelling software - a comparison between the Bluthner Digital Model One (BDMO) and seven others:

http://www.proaudiovault.com/bdmo-comparison.htm

There are eight samples; one must keep in mind that the BDMO sample will be "offered" in the best possible light. For example, not all samples seem to have used the same midi file - at the beginning of the Garritan Steinway sample (a major competitor), the tempo of the phrasing is quicker than that of the BDMO (and others).

The BDMO seems quite good - surprisingly it's much smaller than the other sampled pianos too.