Don't have it, but have been thinking about it, along with similar floorpans from Winnebago (Era 70X) and Roadtrek (E-Trek, RS Adventurous, and the Chevy-based Versatile).
What's holding me back is that I already drive a 1-ton passenger van, I know how it handles and rides, and do not have the expectation that an even larger van is going to be more comfortable than a decent mid-size sedan (have owned five of those over the years) and certainly not as comfortable as a nice minivan or mid to full-size SUV.
What I hate most about the van I already have is how hard it is to find a place to park it, when I get out of Suburban and six-pack pickup country into areas where most parking is sized for passenger cars and mid-size SUVs. Thus what concerns me about a 25-foot Eurovan B is that it is going to be almost as difficult dealing with parking in the city as is my current 29-foot motorhome. At least the Sprinter-based van conversions are under seven feet wide.
A neighbor occasionally drives his Era 70 around town, but this is in the world of everybody driving 22-25 foot trucks, so it is just another form of 25 foot truck here.
You might look at Roadtrek's 170 Versatile, as it is no longer than the standard 12-passenger van, compressing a similar floorpan into a shorter space. It might work for two adults and two small children, while the larger B's are about trying to seat 6-7 grown adults for travel.
Tom Test
Itasca Spirit 29B