The car & rack are longer, no doubt, but as previous posts have mentioned, it is still shorter than a full size pickup or large SUV. The racks themselves are expensive, and some of us have bikes that can cost thousands, so you have a lot of value sticking out behind the car. The rear backup sensors are worthless with the bikes on the rack. The camera works OK, depending on where your bike tubes sit in relation to the camera. But be extra careful when backing up. I usually back in to parking spots to ensure that the bikes aren't hanging out in a parking lot aisle. I wouldn't 'squeeze' into a tight parrallel spot. So there are some precautions one should take if transporting bikes on the back of the car. I haven't taken a long trip yet with my rack, so I can't speak to how easy or hard it is to use the Superchargers.
I have an ecohitch, and use a Yakima "Dr. Tray" rack for our bikes.