Does anyone have any experience with a custom made, rigid polyethylene shower pan to use under a tile shower. They are intended to take the place of a copper pan or formed in place synthetic liner? The concept sounds good to me and I am thinking of trying one, but I would like to get some other opinions. For a description, see http://www.dixsystems.com There is a good sketch within the site and a good schematic.
The manufacturer says they are something like tupperware.