The Fazioli is the very first 3rd party thing I bought when I switched to Logic in 2010.
I'm not sure I would have had heard of them if not for the fact that few companies sell libraries that are compatible w/ Logic's sampler. As it is, looking for an EXS-24 compatible piano, I was bound to hit their website sooner or later.
I love the Fazioli, and it definitely has its uses, but as the name implies, these are "imperfect", and those imperfections can sometime be a bit intrusive.
After all, there is a reason why pro studios keep their piano well-tuned and in working order - there's more to liveliness than noises and other random imperfections.