I went from a Ford E450 28' class B+ with one side slide to a Mercedes Sprinter 25' B+ with rear and side slide. The interior layout and length was nearly identical with rear slide extended. The biggest reason for us to change was easier to maneuver in tight state and county park campgrounds, gas stations, and parking lots; quieter ride, less intimidating for wife to drive, driver comfort, fuel economy, and long term resale value. I have never had issues finding diesel fuel and for me an oil change requires 6 quarts more oil, a minor cost adder. Fuel economy towing the same car with both, Ford 8mpg, Sprinter 16mpg.
