This module allowed me to do something that I personally think should be built right into Joomla - the ability to display a module on an article page based on the article's category. Awesome that this work-around exists though. Very powerful self-serve conditionality for modules!
This is a great extension. Very easy to set up, even with a custom template.
I had one issue with trying to center the menu on my 2.5 site and posted to ARI's forum, and they answered with an easily implemented fix within a few hours.