This is a roundtable discussion on model-driven software develoment and product line engineering. It was recorded at the Model-Driven Development and Product Lines: Synergies and Experience conference in October 2006 in Leipzig. The panelists are: * Axel Uhl, SAP * Danilo Beuche, Pure Systems * Juha Pekka Tolvanen, MetaCase * Tom Stahl, b+m * Ruediger Schilling, Delta Software Technology