The feature-set of bbPress is nowhere near as comprehensive as dedicated forum software such as phpBB or vBulletin, so why use it? There are a few compelling reasons why.
It’s lightweight. Forum software is traditionally bloated, full of security holes, and a real drain on your server. The latest version of bbPress (v2.5.13) is simple to use and open source – so you can tweak the plugin as necessary.
It’s fully integrated with WordPress. This benefit goes beyond the ease of installation. bbPress takes advantage of the WordPress user management system, and has access to the vast WordPress plugin repository, where you’ll find a decent number of specific bbPress compatible plugins. One of these is BuddyPress, a template for a WordPress-based social network that actually uses bbPress to power its forums.
Customization is easy. bbPress has a unique advantage over other forum software when it comes to customizing the styling for your forum. Since it’s built for WordPress there are many amazing themes (like the Total WordPress Theme) designed specifically for bbPress so changing the look for your forum is as easy as changing your theme.