Ma Jabber and her husband purchased one a little over a year ago. Very nice inside. They're never home, especially now that Ma officially retired in February. They've got their two little rat dogs and they cruise all over the place. She did say that the bus is more than they care to deal with for more than about four hours per day, so they carefully plan where they will be and when. The only time the plan hasn't worked was when they were up in DC last November and intended to stay for Thanksgiving, but the weather turned forcing them south sooner than they expected. They left to avoid icy roads.
I know theirs has a generator, but I can't think of when they'd use it. Maybe the few times they crashed in a rest stop or something. Usually, the fancy campgrounds where they stay have power. But, if I'm not mistaken, theirs is internal and may be part of the primary motor. I know it runs on diesel.
I should mention that they lived in the thing for about two months while the floors and cabinets were installed in their house. Odd that the RV cost more than the house is worth even after renovations.