 Prior to purchasing my ECO I saw a review about this car on line. I called two dealers and they had no idea what I was talking about when I said I wanted to read test a Sonata ECO. The third dealership I called said they thought they had an ECO on the back lot. It was a 2015 ECO and it was quite dirty, as it had not been moved or driven  in many weeks. Anyway, we took it on a road test and my wife and i were impressed with the spaciousness of the interior and the trunk...huge.  The car rode smoothly  and handled well for a huge sedan and the brakes felt very good as well. The salesman explained the three modes of the 7 speed dual clutch automatic transmission, similar to the type found on Porsches and Ferrari's...Normal, ECO,and SPORT. Normal and ECO modes made the Sonata drive like any other midsize 4 cylinder car, but the transmission super quick shifts made the car seem quicker. Then I selected SPORT mode...and holy crap! this car flew off the line, actually spinning the front tires when the turbo kicked in at 1500 rpm. I have seen road tests from Car and Driver where the ECO hits 0 to 60 in 6.5 seconds and does 92 mph in the quarter mile. Needless to say, I ordered the 2016 ECO and I have not been disappointed. My previous car was a 2003 Toyota Corolla. This Sonata is literally twice as big on the inside and the trunk is 50%  bigger. Front seat legroom is amazing...I can fully extend both legs while driving. And the electric seat offers many adjustments. Gas mileage around town is 3-4 miles per gallon more in the Sonata compared to the Corolla. A recent trip upstate with 4 full size adults in the car gave 34.5 miles per gallon.  Buy a 2016 ECO before Hyundai does something stupid and decreases its performance, because it is much faster that Hyundai's  2.0 turbo that has 75 more horsepower and costs many thousands of dollars more than the ECO.  And, my ECO is still not yet broken in, with only 3700 miles on the odometer.