Looks nice! The design of the example PDF is a bit noisy for my taste (the geometric shapes at the bottom of every page). And the demo PDF you generate by uploading a markdown file has a lot of whitespace. But I assume that's all tweak-able with a real account.

I got an "Oh no! We hit a snag processing your report. Markdown help." error without telling me what was wrong with the file. Seems like images break it.

For making these kinds of PDF I currently do this: 1. Write version controlled rst/markdown/creole. 2. Convert to HTML with a small script / command line tool (which also lets me do pre- and post-processing, like adding CSS). 3. Use chrome's print dialog to save the page as a PDF. This works pretty well for me.