A highly customizable yet user-friendly CMS.
Ranked in these QuestionsQuestion Ranking
Pro Highly customizable templates
Joomla allows for heavily customizable templates to be changed from the admin interface without needing to hack.
Pro Powerful and user-friendly admin interface
Admin interface is constantly being iterated on to remove unnecessary legacy features and to streamline the interface. Resulting in a very clean and easy to understand interface that also offers a wide range of options.
Pro More than 8000 extensions
Which can be found here.
Pro Easy to pick up
Pro Great for social networking and commerce sites
Joomla has both a good native support and a great list of extensions that make creating either a social networking or a commerce site easy.
It's common-place for a Joomla-based website to be defaced, often very quickly. This is most often due to the low quality of extensions.
Con Extensions are scarce, badly maintained & rarely good
If it's not part of the default Joomla installation, quality extensions are rare. Joomla has a extensions library, but it is full of abandoned, dated or bloated components, modules and plugins.