I'll provide one answer about the appeal of the Sprinter: the comfort of the cabin. I personally couldn't get along with the narrow footwells of the Ford chassis. Chevy is better but doesn't come anywhere close to the spacious Sprinter cabin. When I was shopping there were zero short class C motorhomes with slideout on Ford or Chevy where I could put the driver seat far enough back with the slideout in. In the Sprinter the seat will slide further back than I need it to. Driving all day with scrunched feet and sitting too far forward was simply not an option for me.
I do somewhat live in fear of the cost of Sprinter repairs. Most owners don't have any major problems, but the few that do get hit hard. As far as stability goes, it's a real handful in a gusty crosswind. I can't make a comparison to Ford or Chevy. I've never felt that there was any danger of the wheels on the upwind side leaving the ground. I once made an unscheduled 2-day stop in western Nebraska because I thought it was unsafe to drive in the winds. After seeing a couple of semis on their side I would have made the same decision with any chassis.
