Just been playing around with this theme for about an hour now and it's darn impressive.
Simple, but with lots of options - sounds like an oxymoron, I know. But everything is well laid out and explained.
I usually get a theme and then have to dig into the css (at least)code and make changes. With this, I think pretty much everything need is right on the options page and is easy to adjust/test from there.
To the author: very nicely done! I like the way you thought through the details.
One thing - "To upload the image that goes across the top of your website go to Appearance / Header in the left sidebar on this page"
I don't have an "Appearance / Header" link on the left sidebar of that page. I don't see that on any of my wp installs. So got no header at the moment,