Absolutely abominable. Don't know if it's the OpenGraph that's crap, though it's easy to believe that seeing how you have practically eliminated apps like Social RSS from being fully functional for WordPress powered sites.
This should not even be allowed in the repository. Waste of time. Convoluted settings, practically impossible to setup unless you happen to be tech savy, particularly FB tech savy.
Finally, if you've been patient enough to sit through a couple of hours of pure frustration with some internet guides trying to to their best to help you with this piece of crap, there appear to be constant issues with publishing.
Ridiculous requirements for fanpage naming in reference to the app name.
Tags, images, pulled wrong from websites, at random it seems, being in no way associated with the post that is being published.
And last but not least, it does not show up in the Plugins list in WP admin, so can't delete it unless you have access to your site's ftp.
'Make your WordPress site social in a couple of clicks, powered by Facebook' - the description should be taken off, it's straight face lying. You can't even uninstall it with a couple of click, let alone set it up.