Someone introduced me to this plugin a while back, and I thought, how good could a free plugin be? Let me tell you, it is the bomb! I don't build a site without this plugin as an indispensible part of my site structure.
A good example of where I have used this is on the site which is all about hair clippers, and in particular discusses the best hair clippers for black men
If you are interested in seeing how the plugin works in action, check it out!