The Lexus is tightly built, has all the gadgets you can ever ask for - that actually work as they are supposed to - and looks great inside and out. However, as a former 5 series owner, it also made me understand what they meant by Lexus as being just a Camry with leather. However, the GS IS a very dependable Toyota with many, many quality upgrades if that is what you are looking for. Personally, I wasn't.
Smart Key. Mark Levinson is just out of this world. The stereo alone justifies the purchase of the GS.
Steering weight is dangerously light at highway speeds. I always find myself wandering off to another lane. Rattles in a Lexus? Very tight head room - I am only 5 11.