I've had the Audi A8 and the Mercedes E-Class and by far I must say that the new STS is by far the best to drive and it handles on a dime. I was merely impressed to see that GM has gotten a vechicle to play with those that others claim to be the best in this class.
I like the Bluetooth, the 5.1 Bose and the keyless technology.
† Edmunds.com received the highest numerical score in the proprietary J.D. Power 2014 Third-Party Automotive Website Evaluation Study℠. Results based on responses from 3,381 responses, measuring 14 companies and measures third-party automotive website usefulness among new and used vehicle shoppers. Proprietary study results are based on experiences and perceptions of owners surveyed from January 2014. Your experiences may vary. Visit jdpower.com.