Tried several times to get this to work, and couldn't see any changes other than it broke my theme in Archive view.
Examining the generated code, I saw several inserted DIV's, and oddly, lots of blank CODE groups. Didn't see where the CSS was included, which might be the problem.
Love the idea of the simple shortcode. Unfortunately I couldn't get it to work.
p.s. Seemed odd that the plugin's settings panel wasn't under the Settings menu.