I would try it out before buying. Most of the replies you got were from people who don't own a Winnebago Sprinter J model. A Winnebago Sprinter Class C is only 7 1/2 feet wide. Most of the responses are from people with an RV that's at least 8 feet wide. That width reduction has to come from somewhere. Either the bathroom, bed area or both.
Fran, Mary & Zoey (silver Cocker)
2006 Itasca Sunrise 35A, 2005 W-22, Allison 1000 5 speed
'13 Ford Focus ST or '10 Prius on Master Tow Dolly 80THD-SB or '00 Jeep Cherokee 4-down