I had an 2004, sold it and bought a 2008 after testing the 2009 TL which I liked but could not justify the $9,000 price difference. The 08 feels more sure footed and grippy compared to the 04 and their are better ergonomics inside.
Like the interior lighting. ELS surround sound. Drive by wire acceleration. Simple controls.
Would like some split fold rear seats. Better all season tires.