It's 3d with plenty of drag-n-drop people and props. You can also build to-scale floorplans and choose real camera/lens formats to see if that interior wide shot is possible for instance. You can set and position multiple cameras (making storyboards of OTS shots easy without moving a single camera). You can take screenshots from each camera and organize them in a storyboard that allows for notes and will also show overhead blueprints for blocking purposes.
You can also crudely tween animate between keyframes (snapshots) of each camera/actor/prop position. Export out the rough animation as a jpeg sequence and you can bring it into Premiere, record a voiceover and have a pretty well done animatic (commercial clients love this, since you can show them how 30 or 60 second spots really time out).
I've used this on about half a dozen client jobs. The animatic during the bid phase won us a job as well. They all seemed to like it.