Why? It's MUCH more aerodynamic than a wagon or a sedan, and you get much more space. If you have to transport something tall you can leave the hatch open.
The downside of the BMW version is that it's supposed to be a semi-SUV so it has a stretched wheelbase and rides higher
this car only has more space... because its actually bigger. its 8+" longer than a 3 wagon with a 3" higher roof. this isnt some sort of miracle of space efficiency.
