I have had this rack on my sprinter for a couple of years and I'm pleased with it. Simple to put on and off, no screwing in sheet metal. It hangs off the top of rear door and the bottom of the door. It is very secure and works well on bumpy roads. You can open the door with bikes on which is handy. It also has an adapter for 2 or 4 skis.
I used to have one on the back of my VW Eurovan camper and was happy they made one for the sprinter. It sits high so it doesn't block license plates or taillights.
Nice alternative to a hitch mounted bike rack