A couple years ago, the latest and greatest thing on the planet for sampling was Dimension Strings.
This library actually accomplished what DVZ Strings - remember that company? - promised but didn't deliver.
I still feel that Dimension Strings is the single most magical creation in all of modern technology according to Arthur C. Clarke's definition of magic - "sufficiently advanced technology is equivalent to magic." It is as if one has each individual player sitting in his studio, with all the complexities that a each human brings to musical performance. This happens with the individual players who still play together, and all the complex humanize settings that can be changed however one wants.
I am sure Synchron Strings will sound great for people who want instant perfect sound, but there is nothing yet that can match the Dimension Strings combination of "complexity with simplicity. " I am still working on ways of fully using this most awesome creation of VSL, which is definitely the high water mark in musical technology. I wish they would do more though I understand it is so hard to do even one instrument with the Dimension approach it is probably not going to be pursued further.