The board is SEO optimised and gives you the option to add banners and advertisements above and below the topic lists and the topics. You can change the forum icons too.
Because of its simplicity Discussions is very fast and excellent for reading long topics.
The only minuses I can mentions are the fixed avatar width and height (128x128)(bigger avatars don't work; smaller look bad) and it doesn't support alternative images for "HOT" or "NEW TOPIC" forums.
These flaws are really not essential, because Discussions does everything else perfectly. Two thumbs up.