How good? Let me tell you...
Support for PDF table of contents
Section names and numbers in headers/footers
Compressed PDFs (or not)
Guess image sizes. Specially if you meant to use them in a web page and declared just ":width: 50%"
Gutter margin support
Raw directive (insert pagebreaks and vertical space manually)
Offers a docutils-compliant API (and another API, too)
Include full or partial files for code-block. That means you can extract code and show it in your document!
Huge code cleanup lead by Nicolas Laurance.
Working multilingual hyphenation. You can have a per-paragraph language and hyphenate it correctly.