If you are purchasing a STS- V Check out the tire noize, almost 95 dbs. on a concrete freeway, hard to talk to a passanger or hear the radio at 65 mph, I took the runflats off and now it is a pleasure to drive.. Negociate a spair from the dealer and regular preformace tiers BEFORE you purchase. I put on Toyo tiers, no trade in they have a back room full of Perelli run flats that been taken off... GM said toooo bad so sad...I should haven test drove on the freeway.
Pencil holder, quieter ride, not easy to enter and exit. blind spots with the small mirrors
Bought the STS V the first week of December and have taken a couple of 300 mile trips in it. It's very comfortable, powerful and a real pleasure to drive. Positive handling and extremely smooth on the highway. You forget you're driving a big Caddy and think you're in a very fast sports car.
Heads up display, lane warning, blind side warning, comfortable seats, 15 speaker Bose surround sound, push button start, 6 speed trans, powerful engine, blue tooth tech, steering wheel controls, auto wipers, auto dimmers, about every thing on the car!
I would reccommend putting the siblings 6.2 litre motor in this car; however I understand that after 2010 the STS will no longer be made (too bad).