After enabling the plugin, all your native wordpress galleries will be magically transformed to, what I like to call, a Responsive Gallery Grid. Really! All you need to do is enable the plugin and your galleries will all look like this:
Note: In order to get the lightbox, you can install any third party lightbox plugin. I’m using Responsive Lightbox by dFactory on this site. To set it up the only thing you need to do is install the plugin, go to Settings > Responsive Lightbox, and then check Force lightbox.
Too boring for you? Check out the somewhat more advanced examples