We've complimented the GS 450h for its excellent build quality, and can say that the materials used in its construction are almost equal. What's holding it back? It's the leather upholstery, which feels durable, but for use in a $63,000 ride feels as though it could move up a grade or two since it has a feel too similar to vinyl. Otherwise, there's much to like, such as padded matte plastics with matching grains used generously, matching material on the headliner and pillars, beautiful wood trim that looks rich, alloy sill plates, and soft-touch materials on most every surface a fingertip can reach.