So here's a post about the dealer we purchased our 183G from in November 2016.
We were given the tour that highlighted pretty much EVERYTHING we needed to know. It was overwhelming, but they did a pretty good job of giving us the beginners tutorial.
Now, the part that made me angry. We bought the Pod in the fall and it was already winterized. We parked the Pod and didn't un-winterize until spring. And that's when we discovered that the black tank was not empty. They sold us a used camper with poo in it! Did we just have to dump and flush? Yes. But why would they let a black tank go out dirty?? Disgusting.
Bottom line, if you're buying a used Pod, be sure to check that the tanks are empty so you don't bring someone else's sewage on your first trip.