I purchased one of the first 2011 models in July 2011.
I am VERY satisfied with the car in general including the fuel economy.
I recently made a 1,000 mile trip driving 68 mph and averaged 40.2 mpg.
Around town I average 37 to 38 mpg.
I drive to maximize the fuel economy by accelerating mildly from stops.
The only negative is the seat comfort.
The seats are hard and the passenger seat sits too low.
Seat comfort is very important; so important that Hyundai must improve before I will consider another one.
The 2012 models have a lifetime warranty on the drive-train; whereas, the 2011 models have a 10 year, 100,000 mile warranty.
Hyundai should retroactively upgrade 2011's.