This is a particularly nice way to look at a large graph with many labels and relationships. It's useful on small graphs, too; but, really nice for large graphs.
I only noticed two things while trying it out. First, the Dossier frame has expand/collapse buttons on the left that overlap with the window scroll bar. Second, the popup icon to add a relationship to a labelled category can be a little tricky to grab.
I love that it's super fast and responsive. My big graph has several million nodes and tens of millions of relationships, yet the image response is practically immediate. The utility is intuitive and the interface is attractive/inviting.