I bought the STS because it fit our wants when shopping used cars: luxury, comfort, cheap. Poor resale value has worked just fine for us since we can buy a little more car for the money on the used market. Overall, I like the styling of the STS inside and out. Many prefer the CTS in both respects, but I prefer the toned-down design of the STS. I am not normally an extended warranty fan, but anybody considering the STS would be wise to find one under factory warranty, or in the case of a 2005 or 2006, a factory CPO warranty. Many little problems crop up. Take reviews here with a grain of salt. The 'high-end' stereo is NOT all that and is easily trumped by a decent aftermarket ones.
Exterior styling, smooth acceleration, wood accents, heated/cooled seats, no major failures.
Nearly useless Voice Recognition (VR), Nanny DVD, Nav and BT interface (cripples system when car is moving, hint: buy a kit and disable it), abysmal gas mileage, average seat comfort, relatively poor legroom in rear, many minor issues pop up
† 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.