 I have 1600 miles on 2011 Sonata Hybrid and have averaged 31 mpg over mostly highway driving to and from work 90 mile round trip which is 80% highway with light traffic and very few traffic lights.Performance between 20-35 mph is sluggish, and engine clearly overrevs in that range. Bluetooth connection with my Samsung Galaxy Edge Droid does not work.You can establish a temporary connection which I did when I test drove the vehicle, but it does not hold.Streaming audio almost never works due to bluetooth phone issues.Sunroof rattles at highway speed.Front windshield fogs up on outside all the time from bottom to about 12".I prefer my 2004 Prius with 189K miles & 45mpg.