I love this car. Engineering,ride and drive are superb. I would recommend this car to anyone in the market for a premium sedan. However,there are some annoying glitches which mine has. The worst one is a dead battery which happened twice in three months. the dealer says it was a bad cell. HAS ANYONE HAD THIS EXPERIENCE? It also had the dreaded kazoo windshield noise which was fixed. Now it is also making a popping noise from underneath the car, which I suspect is the exhaust heat shield. The car died and was restarted immediately once on a hot day. The people at my southwest Missouri dealership are first rate and are cooperative. I now carry walking shoes and a cell phone. When the battery goes, so does the standard OnStar. I also fixed a rattle in the dash by installing an old cut up windshield wiper blade between the windshield and the trim covering the A pillar. Thinking about an extended warranty? You bet.