Excellent comfort and ability to haul your entire family in comform and luxury, and then, when you are alone, press the 'power' or M button and full 504 horses kick in, then it becomes a screaming beast that virtually no other car on the road can beat. Think of it, how many 500 HP V10 vehicles are there? Gas mileage is ok in regular mode, bad in full power mode, but that should be expected from a super sedan like a BMW M5