I've just installed this and its brilliant apart from one little niggle.
The custom options settings dont work.
I've got 2/3 columns enabled but its not perfectly 2/3.
I set 1/3 to 370px (0px margin) and 2/3 to 548px (0px margin), clicked save - the settings show in the custom settings but they arent reflected on the site.
I've ticked the box for custom settings too.