Some notes had a really annoying nasal and metallic sound (even more nasal and metallic than all the others), and the only way to fix that was to change the string length a little bit. That means you will also not be able to change string length, and you won't get note edit for volume. The thing of note here though is that the stage version doesn't allow you to fine tune the instrument beyond the preset choice.
Every time I play Pianoteq and move back to a sampled piano it always feels soo good. I personally think its playability is great if you spend the time to configure it, but the sound will always sound synthetic and fake to me. There's hardly a piano VST that is more divisive on here, some love it dearly, some hate it. Wait for some other people's opinion about this though, as I said there's people who really like it.
Even after hours of fiddling with it, I couldn't configure it so that it would feel natural when playing, and I couldn't get the dynamic range to be large enough for loud notes to really feel loudly.
The worst thing about it is that it has several settings for volume/velocity/sensitivity (or whatever exact terms they used). The Ravenscroft has some fans on here, they often cite it as one of their top 3 or top 5 piano VSTs.
