I've also used Joomla and I agree, it does do a very nice job.

Probably the number one reason I switched to C5 is the total freedom to organize your content any way you want. Instead of having to fit your content into these confusing structures, like "sections" and "categories", in C5 everything is just a page, pages can be easily grouped into sections, and you can put any blocks of content into any of the pages anywhere you like.

I also am a big fan of in-context editing. It makes it possible for more of my clients to manage their own content, and those who do absolutely love that they can.

I can think of several other things, but those are the main two for me.

I was a DotNetNuke guy but needed something to use on Linux systems. I went looking at all the different CMS platforms and for me they were just all the same ole, same ole. When I found Concrete5 my first impression was they are doing something different and really cool with this CMS.

Now I am working exclusively with C5, I can develop sites faster than I could with anything else I have tried, my clients love it and there is a good community here. The more I do with C5 the more I am impressed how there seems to not be a thing I can't make happen.

It Rocks!