For me it is two steps above. It is all personal. I still use plenty of other string libraries, but I almost always start with Afflatus. The sound of Afflatus is the warmest and most glue like. The Legatos are, for my personal taste, the most realistic and musical. When moving from one chord to another it really does sound connected, glued. The sound of the legato transition sounds beautiful. The Polyphonic legato is revolutionary and works seamlessly, and is for me it has been conducive to better and more cohesive chordal writing. There are many great string sample libraries out there, and I have a good chunk of them, but this one just happens to be my favorite of all of them. But like
@Craig Sharmat said, if you are writing an action cue you may start somewhere else - having said that, the psychato shorts are amazing for action. And really capture an energy of playing that I did not find in other libraries for this type of intense short.