I have just completed implementing this plugin at http://theseosystem.com.
I really like. So, why did I not give it 5 stars?
Well, because of the ads. While it is a free plugin, you have to pay to get rid of the ads that pop up when a user actually wants to print.
This is fine though as a I respect the developers need to earn a buck or two.
I hope this plugin works well for you. It was as easy as advertised.