The core discovery of the therapy is that the human mind has an inherent multiplicity. Once you accept that and go from there, the rest of the technique emerges naturally. It's really quite amazing. I highly recommend the book "No bad parts" by Dr Richard Schwartz, the discoverer of the technique.
What really excites me here is the use of a virtual avatar that personifies the voice. That is really new to me and I can see all sorts of possibilities to link with IFS.