 Bought the Sonata almost 3 years ago and now have 55k mostly highway miles. Travel about 80 miles/day for work. The cloth seats are some of the most comfortable non leather, non premium seats I've used. Nice thoughtful interior. It has so many upgrades that have trickled down to a base car over the years. The ac and heat are fine although climate control would be nice. The XM is a feature that I use regularly and enjoy. I have done nothing to it except regular maintenance and a new set of tires. I average about 30 mpg going 70-75 on the highway. 