Welcome to the site from SW Idaho.
If you have not please go to the sites Library and print out a couple of copies of the PDI list.
Forest River Forums - Downloads
Look your whole unit over because you are the last inspector, make sure EVERYTHING works and that you understand how everything works.
Have them show you where the water heater bypass valves are, low point drains, sofa bed setup, antenna booster switch.
Does the micro work?
Put a cup of water inside and see if it gets hot, or you could pop a bag of pop corn.