We bought the B because I needed my wife to share the driving. We take long trips and she wouldn't drive the C we had. She has probably logged as many miles behind the wheel as I have. It is very easy to drive and very maneuverable. It has typical RV rattles and noises. Very quiet on smooth freeways, less so on pot holed city streets. Some is Promaster, some is Winnebago.
The tank arrangements on the "k" are better than on the "g". The Truma HW and heat system now comes on both the "g" and the "k". I've heard no complaints.
We like the layout of the "g" mainly because there is more than one place to be in the van. If someone goes to bed, the other can stay up at the dinette or the front seats. And I like sleeping next to my wife.
Eric