Still, I'm getting the hang of it slowly. Working with the three edit forms (vertex/edge/face) reminds me of working with the three segment levels in metrics reporting (view/visit/visitor). The model/data behaves differently depending on which one is selected and at first the results seem random. But once you know what granularity you're dealing with, it's pretty handy!
Now...if I can just make this blaster *pew pew* :3