As the other plugin from Nextend for connecting Twitter, this plugin is easy to use. One has to register a Facebook app (takes only a few moments) and put in the corresponding information in the plugin's admin panel.
No analytics, no other stuff simple "connect". A nice add-on is the free button generator which can used with this plugin.
The plugin works also on WP multisite for us. As pointed out here in the forum, the support is remarkable!