This is now my 3rd Lexus. Prior vehicles were the ES and IS 300's. The GS is by far the most refined of the trio. Before purchasing the GS I test drove both the IS 250 AWD and the ES 350 and although I was impressed with both cars, once I got into and began driving the GS it was then easy to decide this was the car I wanted.
I love the interior. The inside surrounds you with leather and wood. The controls are positioned so they they are easily within reach and the center console makes one feel like they are in a cockpit.
The nav screen could be a bit bigger. I would also like more power but they have already addressed that item with the introduction of the GS 350.