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