I like that it allows me as developer, not only designer or tester of my software system to be able see what's going wrong with one single function call (or even without doing any coding at all). It also helps when you want your code unit tests run automatically so they're always up-to date. The GUI looks dated now but still works fine - no problems there! You can't export source from other applications into this tool if those are written using different languages/frameworks etc., which would have been nice for us since we were missing some basic C++ classes such Python has by default available. If you need an easy way to document functions then go ahead; otherwise consider something else instead because most likely you'll find another easier option out there somewhere ;-) We've used it mostly internally where our developers needed access to documentation quickly.