Superman Director Found?

Here I was, looking for something to blog about when lo and behold they announce who is directing the next Superman movie.

Here's the thing, though: I don't know anything about this Zack Snyder guy. The only thing of his I've seen was the Watchmen adaptation. I mostly liked it, but that's just one movie after all. He's done other stuff as well. Is he a good director? Bad? Fair to middlin'?

I haven't seen a lot of movies in the past few years. So, to anyone out there more familiar with Zack Snyder's work than I: should I be worried?

Of course, a big part of any future Superman movie will be the script. And I haven't heard anything about that yet. Baby steps, I guess...