I recently purchased a 2005 TL w/nav, Black on Black (59k miles). I can't imagine a better driving experience. Great power/handling/fun/wow factor/super highway ride/pretty good gas mileage. Awesome body style that gets max attention--and that's before they get inside! Amazing features and luxury feel to sporty car with great driving characteristics. A little first gear handling issue under full acceleration, but nothing one can't manage easily.
NAV, voice-activated controls, steering feel, super traction on my Michelin Pilots, fun acceleration, awesome looks (I know of no other car in class that turns head like this one). Looks way better than 2009 TL.
In the sport shift mode, eliminate the auto shift from 1st to 2nd. I think this would improve 0-60 times in the 5AT. They should make Michelin Pilots as standard tires. Make wing spoiler standard equipment (awesome add-on).
† 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.