I recently purchased this quite expensive library and wrote a nice song with it in Logic. When I went to re open the project some weeks later after working hard on it (I leave my computer and session open usually) , the following happens:
Kontakt 8 does not load any instances of Cremona Quartet Ensembles whatsoever. No error message, no "samples not found" nothing. Just a project with all BLANK instances of Kontakt 8.
I've been a professional composer for 15 years and used every single instance of kontakt to ever exist (no joke) and nothing like this has ever happened.
I wouldn't trust your work with this product any time soon.