Elemental's campaign paints broad strokes. It's not a long, detailed story that winds its way through hour after hour of nail biting drama. As such it's a great introduction to the game. Not so much a tutorial really, although it does hold your hand a bit and does a great job of slowly introducing new concepts.
And it's fun. It provides a modest challenge and rewards you for putting together armies. It's not hard, really, but it's not what I would call a total breeze either.
I've seen a few bugs and one crash, but overall it's worked really well and looks and plays great.