Yes, this plugin works great out of the box is amongst the best out there. Functionally it works great for the most part. However, it has a few shortcomings if you're a developer.
There are some core issues about the way it's been coded which, contrary to the plugin authors statement "built in the wordpress way", is not built in the wordpress way. Well, not to a certain extent.
A revisit to properly understand how custom taxonomies and post types work together as well as the wordpress templating system, would greatly benefit all involved. Theme integration and some basic functionality (eg breadcrumbs, built-in wordpress menu classes) would certainly be improved instead of hacky-hack-hacks needing to be implemented to make things work.
So to go from a good plugin to a great plugin, these things need to be addressed.