It's an awesome highway cruiser. Just set the cruise and you'll be good to go (and it will keep you out of trouble as the car is so quiet).
Did 2 long trips in ours, one to Houston and back through New Orleans, Nashville, etc. and put about 2.5k on it in a week. Was a great trip and I did 99.99% of the driving and was fatigue free.
Got back from a Florida vacation where we drove. Did just over 1k miles in a day in the car. No fatigue either.
On both trips we averaged just under 26 MPG. Not bad for a full size car that can smoke 90% of the cars on the road!