This is a great plugin. I felt compelled to write this after implementing it into a theme I am building. It is easy, well documented, and works great. After reading the 1 star reviews of this plugin I had to turn around and give it five stars. Just a note, a upgradable / premium version means that the plugin author may have some income to continue supporting this product, which is a good thing. It takes a lot of work.
Great plugin, well documented, solid code!