 Purchased new Sonata; Silver, SE in March 2016. Now have 4000 miles on the odo. Replaced OEM Khumo Solus tires with Continental TrueContacts at 900 miles. Transformed the car's ride and handling, much quieter, as well. I'm using the manual shift mode with the auto setting on sport which increases the steering effort. Downshifts from 4th to 3rd are sometimes abrupt. I'm accelerating more aggressively, though not revving past 4500-5000 rpm. The engine is quick and smooth with no hesitation or flat spots. Still haven't floored it 100%. Not sure what the Edmund review meant by "unrefined engine". Changed the break-in oil and filter at 3200 miles; the oil was very dirty. Using Mobil 1 Full Synthetic with factory oil filters and will change both every 5000 miles. I check the oil every week and the level is exactly the same each week. Debating whether or not to install a K&N Oil Screen engine air filter. Will continue to search the web to see if anyone else has done so. The radio switches back and forth from regular to HD on weaker stations often, very annoying. There doesn't seem to be any way to reset the sensitivity level or manually select or or the other. I listen to my Ipod most of the time anyway. I will NOT continue the satellite radio or the On-star. In fact, I placed a piece of electrical tape over that annoying blue light. Getting 30.4 mpg in mixed driving. Using Sunoco regular octane exclusively and Techron fuel system cleaner every 4th tank. It's quiet, comfortable, rides and handles very well. It's a good looking car, too. Overall I really like the car. Despite the traffic and crappy Central Pennsylvania roads, it's fun to drive. Looking forward to lots of trouble-free miles.