I purchased this car strictly for fuel savings and putting a lots of miles. The car far surpasses the rated 30mpg/city, I get routinely over 35mpg city.
This is a heck of a car, well built, quiet and quick, very well equipped as well. I got the 3 year free maintenance. and a 0% finance for up to 72 months through Volkswagen financing. I also got the car for $500 below invoice so I know I scored. I am currently saving about $150.month just on gas alone(diesel), I am doing over 1000 miles/month and like I said the savings are significant.
I recommend getting the 5 door for easy access. I also highly recommend you getting the DSG transmission, it is worth every penny.
I you are looking for a well built VW car, this is it. I also have a Passat TDI which is the long trips family car. Before you consider the jetta please take a look of the Golf first. The golf is built in Germany and it has the good cluster with real gauges and soft touch dash(unlike the Jetta). The golf also comes standard with 17" beautiful wheels, fog lights and a full size on board computer
HID headlights. Better center console storage, the current one is absolutely worthless. Optional leather seats or vinyl seats.