We use Backbone as our frontend framework at my startup. A few months ago we evaluated guided-tour libraries such as Joyride, Bootstrap Tour and others. We liked Joyride at the time because it was declarative with some simple global setup and teardown callbacks, but it quickly became apparent it wasn't sophisticated enough for a rich web app where, in Backbone's paradigm, you're waiting for sync events and other events before continuing through the guided tour. We ended up having to fork and modify Joyride to support the behavior we wanted. This lib looks like a promising generalized version of what we had to fork Joyride to do!