Mura is very simple to use yet super powerful. The fact that we can use an unlimited number of sites with a single Mura installation is a must that allows us to host many language versions of the same site very easily.
What I like the most in Mura is the comprehensiveness of the feature set. It means that we need very few plugins (if any at all) to run exactly the site we need, which makes updating the system a breeze.
The front-end editing capabilities are of great help to author our pages and blog post directly in the context into which they will be viewed.
The content staging feature allows us to work on a set of pages and to test them out extensively before going live.
Mura is written in CFML, which is both its strength and its weakness. CFML is one of the best language for developing a dynamic website, but the CFML community is quite small and the language adoption is far from doing justice to the awesomeness of the language.
Few hosting companies proposes ColdFusion hosting, and, for those that do, it is often a little bit more expensive than "regular" web hosting.
Hopefully the Mura community is very active and friendly, which compensates for its small size.
Don't be afraid by the fact it is written in CFML. The learning curve is very soft and the reward is worth 10 times the training investment... Don't hesitate at all.
We use Mura CMS to power our website in 2 languages (En and Fr). We have also developed a custom Mura Theme, so the site looks just the way we want.
We have used the amazing Display Objects to develop our own training video hosting application on top of Mura, and we have more developments in mind.
Mura is our single stop shop for all our entreprise web communication needs and it has never let us down!