I much prefer hitch racks. You won't injure yourself hoisting the bikes up top. You won't forget they are up there and smash them on the wall above the garage door. Quicker loading and unloading (I assume). Better gas mileage. Nothing touches the car paint. Be sure to get one that swings down to allow access to the rear hatch. The kind that inserts right in the hitch receiver is best, not one that clamps on the ball.