While it looks really nice, hard to imagine it's quicker to hand draw this than reverse it out of your existing schema. I suppose if you are architecting something brand new then it can make some good sense to map it out quickly if you hate clicking and dragging your mouse around and want something version-controllable.
I would say, however, PlantUML is less pretty but more general as a tool and there are neat tools to make the diagrams directly from your database schema [0].