I purchased this car about a week ago, and all I can say is that it is fabulous. The ride quality is superb, and it offers every creature comfort one could need. The seats are comfortable and there is ample room. Why then do critics mock BMWs premium sedan continuously? I believe iDrive is their central concern, but after only two days in the car, I grew quite comfortable with the GPS, entertainment, communication, and climate functions of the car. The only real problem I have with this car is keeping my kids away from all of the buttons that control the interesting features. All in all, i believe this to be a better car than the other competitors.
GPS w/ voice operation, telematics system, comfort of seats, grade of components used, exquisite logic7 sound system, and, of course, the power of the engine and the excellent ride quality of the vehicle.
None so far, but I understand that I haven't had enough time to find faults with the car.