Adding an incredible amount of functionality with just one simple install. Creating a company wide Intranet can be done in under 2 work days. And that is counting extra component and module installs.
The code is clear and simple, with minor knowledge of PHP this component can be modified to suit some completley different means. From game areas to personal user group pages.
I would like to say thanks to the developers behind it, as this is nearly a CMS on its own.