A very good plugin which works well both on site and with google. An example of the plugin in use can be found here http://blog.fieldleisure.co.uk/mind-your-head-when-camping/
The plugin recently was updated to now offer article category. We had a slight issue with it breaking the CSS on upgrading however was easy fixed by uninstalling and reinstalling the plugin.
The support given by the developers is fantastic. They are quick to respond to emails and will help to resolve any issue. Cant fault them.