Haven't had the SES to long but I am impressed with the quality and ride. The leather seats are very coomfortable and ride nicely. Transmission shifts at the right speeds and times, suspension is tight but not too tight and sterring is responsive.
Synch system is nice and gas mileage is impressive, my experience being on the high side of estimates.
Rear seat lighting would be nice, perhaps LED tail lights but those are just a preference.