The sofa in the rear is a nice feature.
I'm curious to find out if you have 1 or 2 house batteries. The specs I've seen aren't clear on that point.
You should be able to download a manual for your fridge from this link:
http://www.thetford.com - Refrigerators
I'd really like to know how well the fridge performs once you've had a chance to use it.
The only concern I've read about re: Gulfstream Sprinter B's is that the on demand hot water might not get the water very hot. Specs state that it'll heat to approx. 30° above water temperature in the fresh water tank. I guess it really depends on how cold it is.
You'll have to let us know how well it works for you.
Congrats on the new Sprinter B!