This is a modeled piano VI that is extremely lean on CPU power and memory. Sounds pretty damned great to me as I am playing the demo (45 day free trial although 8 keys are silenced throughout the range).
I like how you can change the piano from an upright to a concert grand with a couple motions on the editor. Very cool. I don't have a dedicated piano VI and this sounds terrific when played on my Studiologic SL990XP. Might just buy this!