There is a steep learning curve, but once you understand and handle tagging, saved searches, and other wonders, you’ll be fine.
Export to HTML (continuous, manually or via command line options) is great, as I can generate a browser version for the laymen to read. I can even send it to my phone and take it with me.
Warning: it doesn’t make/keep backups of your data. So I strongly recommend you keep a scheduled backup of your Wiki running. I do that with Cobian Backup.
The regular expression search and replace is very powerful, but also dangerous: regex is default in search/replace, and if you intended to do a simple text search/replace and didn’t notice regex was selected, you will literally destroy your Wiki in a matter of seconds. regex shouldn’t be default.