If you look in forums about forums you'll see many people are just very angry when referencing Fireboard. I think it is the lack of support and development that comes with the free component fireboard.

I'm worried about the reliability of the product but do believe they have a following.

You don't have to worry about Fireboard anymore because they changed there name to Kunena. Of course you are probably wondering what changes, nothing really but the name. It's fireboard through and through. In fact the database tables are the same.

I am personally very happy I was able to get the robust and powerful vBulletin up as my Joomla forum.