I've now had the Jetta wagon with the diesel engine for about two months. Assuming it lasts (the engine assuredly will, time will tell about the rest of the car)it is a wonderful car. Comfortable, road-friendly, intelligently designed (they even have a sunglasses holder), this is a great car. And, I'm getting 40 mpg. It loves to cruise at 80 mph. Great car.
We will see how long the rest of the car holds up -- so far it is a tight car with no rattles, etc.