Very smooth, solid, comfortable and quiet (almost eerie-quiet with audio system on). Previous car was a BMW 545i and it's better in almost all respects. Particularly surprised at how quick it is and how well it handles in sport mode; would really give my 545 a run for its money. Also like the feel of the power steering better; much more variable; does not feel as "heavy" as BMW steering at low speeds. My car has just about every option except driver assist. Only major disappointment is the Night Vision system. The infrared camera is really just a grainy B&W camera; there's nothing infrared about it. My eyeball detects deer and animals much better than it does; almost distracting.
Instrument cluster design, sport steering wheel (awesome feel) , two- tone interior, drive-dynamic seats (a must), panoramic sunroof, Indium Grey color (different, classy) hood ornament (classy), LED interior lighting (though they should have done the footwells), overall exterior and interior design
Brakes are weak compared to BMW; just don't have the same clamping force/confident feel. Nigh vision is useless; almost distracting; waste of money. iPod connector doesn't charge the device. Interior plastic a little cheap looking. Footwells should be lighted (somewhat) when driving at night.