This whole extension is a bit tricky to use as it is "rough around the edges" quite a bit in multiple regards and the menus look like crap. However, once you figure out how it actually works and how to use it, then it becomes very effective and pretty awesome.
In all honestly: The real issue of it is not the lack of functionality, but the bloat of extra functionality in the multiple setting-menus, right-click menus and so on, because most of those features are entirely useless to 99% users of this, but can confuse the hell out of new users.