Congratulations on your new coach!!! Be sure to go over the coach top to bottom, front to back with the dealer. Go thru every system to make sure it works. Have the dealer explain how everything works, don't be afraid to ask questions. Ask where all the valves, fuses, and breakers are located. Have your wife present if possible so she can be familiar with everything too.
The Miramar is a beautiful coach, I hope you and your family enjoy many happy and safe miles!!!