4wd ones are barely good for a smooth fire road. My buddy built a 4x one for a rich guy and was close to $200K. All kinds of AM suspension but the non replaced bits couldn't even handle a Baja Dirt road.They are dirt road/fire road cruisers at best. Great for stuff like the desert or Baja. The drawback to the Sprinter is its really tall. The popup feature keeps the COG a lot lower. The new fiberglass body also keeps the weight down.
They are more of a "Dick Measuring Deal"