Just about everything in Confluence shows polish and attention to detail. You can instantly create pages in the designated space and edit with standard wiki markup code or a rich-text editor. Linking to other pages is simple, and the system ensures links don’t break if you reorganize pages into a different hierarchy. Further, categorizing pages into logical parent and children groups is point-and-click simple. Each page has a printable view and can be exported to PDF.
Read the complete InfoWorld review Wikis Evolve as Collaboration Tools. It’s not only a nice review, but also a good primer about wikis.