I've had my Lincoln LS for one year now and have had no problems whatsoever. The 252 HP V8 delivers very good acceleration and passing other cars is a breeze. Fuel economy is the car's one weak spot. The transmission is smooth shifting (nearly as smooth as my old Buick Regal) and throttle input is good. I bought the LSE trim which has a firmer suspension than the standard LS, so road imperfections are more noticable, but the ride is by no means harsh. The trunk is large enough, but fairly shallow. Even though the design is conservative, it still gets attention from onlookers because there are so few on the road. The LS is everything a luxury car should be.
Engine power, ride comfort, stereo sound quality, and the abundance of luxury features.
Larger trunk, better fuel economy. There's not much else to fault with this car!