I have problem when I am trying to use the module variation. I am trying to have an icon (mail) and the result is that I get 3 icons (I suppose that the correct one is the one connected with the module name) and that the column width is affected (becomes very narrow).
Another thing is that the "read me" button is just text - Read me... What is the trick to get an ordinary button or the nice blue one in the bottom of your demo.
My environment is Joomla 3.1.1 and your version 3.0 of Metropolis.Use the url http://www.drewitz.se to see the result.