Works flawlessly as advertised. I am using it for a political campaign and I created a newsletter tab and inserted a newsletter module. It's good to create a regular html/css file for the redirect file otherwise if it reloads to another portion of the Joomla site, it won't fit in the facebook area.
tip: other plugins such as "modules anywhere" and "Articles anywhere" will allow you to insert modules and articles into the fan page! (must use shortcod)