For what I see, it works perfectly out of the box, it's well designed, offers all the features expected for a forum and it's easy to customize.
So far so good, and for my opinion Agora Pro is part of the Joomla component's hall of fame.
For the suggestions, I agree with the first review, and I add this :
1/ In "Vertical" and "Sliding" mode, would be cool if the height of the module could change in realtime to adapt itself when there's a lot of menus items, in order to avoid the vertical scrollbar. (hope I'm clear...).
Good works !