I've enjoyed owning my Cadillac STS - I can sum up my experience like this: reliable, luxury, solid, head-turning, quiet, smooth, f-a-s-t!, beautiful, graceful, turns on a dime, great stability and best of all, my 6'6" husband fits comfortably....
I enjoy the comfort of the heated adjustable seats. I can set my seat to my specs. The stereo is awesome. The Bose speakers are, too. There are too many luxurious features to mention in this space.
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