The ES300 is by far and away the most comfortable automobile that I've ever owned, one of the most solid cars, and technologically the best I've driven. This is the type of car where you'll never say to yourself, "Gee, I wish they had done this or that" as far as the ergonomic and technical features of the car. Everything is laid out perfectly and every bell and whistle that the most tech savvy person could wish for has already been added.
Ergonomics - absolutely amazing with every detail perfectly thought out.
For the luxury vehicle that this is I can't imagine improving on anything.