I have a Promaster-based class C (the Winnebago Trend). My other RV is a Ford E250 based class B. My 24' Promaster is a far better handling vehicle with a tighter turning radius, better resistance to crosswinds, and quieter ride than the 17' Ford. I also have the Sumo Springs bump-stops installed (inexpensive and so worth it). For the cost and performance I think the Promaster is the hands-down best option on the market right now and I would preferentially choose it as a platform for B over the Transit and Sprinter without any hesitation.