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Django CMS is a very mature project, with many core developers working on it constantly and adding new features and bug fixes.
Pro Easy to extend
Documents are organized in a tree. You can either create new content area type, new tree nodes, integrate complete existing Django app in the tree, etc. It's pretty easy usually.
Pro Internationalization (multi-language) support
Having a website in more than one language can be very challenging and DJango-CMS supports it well. Switching between languages while keeping on the page for example.
Pro Can integrate with existing apps
Django CMS is more of a Django plugin which can easily be integrated with any Django app to add CMS functionality to it.
Pro Double click to edit
You can double click items to edit them or add pages directly on the website (as long as you're logged in as admin). It simplifies content creation and touch-ups.
Con May be an overkill for a simple blog
Django CMS project is a large and complex project, comparable to Wordpress. As such, it may be too much for a simple personal blog considering that it has many features that may never be used in that particular occasion.