We are looking into using one of the "rubber slate" products on the side porch of our Victorian home, to match the main roof. (The main roof is Virginia "Buckingham black slate"). The porch is constructed cathedral style of light joists with exposed tongue & groove boards and metal roofing.
The roof will not support real slate, and it is not a good choice due to icicles and snow falling from the main roof. We are sure copper would look horrible after one season of this abuse as well. (Other info: Pitch is about 3:12 and we don't want nails poking through the exposed underside of the roof.)
Of course the slaters' forums trash the rubber products, so we're looking for real experiences such as fading, curling, etc. Any advice is welcome, as well as what brands have worked well.