I like the setup on the GM minivans. Both wipers move from the inside out, leaving only a small area behind the rear view.
The windscreen is cleaned all the way down to the base. The area behind the rear view mirror is not used anyways.
Very effective. There is a night and day difference between the mono on the E320 and the setup on the Montana. I have tested this under similar conditions, there is no comparison.
94 E320 58000 Miles