Stunning. I love the proportions of the back end, sort of like the old Euro Ford Focus. Not as rounded shoe as the current model.
The only thing I dislike is the taillights being that weird shape. Just cut that outer full circle bulb in half like the other one and make it a continuous ovoid thing.
I'm afraid the real deal will pale in comparison to this, but I also have faith in Mazda to at least produce something tasteful and good-looking regardless.
It's more fun to drive a slow car fast than a fast car slow.