I had no significant delivery issues, but I have read enough comments here from others, that when you pick up the car, just assume you are buying a used car from "Shiftys Used Cars", on a "as is, where is" basis, and when you drive it off the lot it is all yours. Test the operation of all doors, the cargo hatch, and the frunk. Look for panel alignments, and scratches.
In regard to the HWPC check this board under Batteries and Charging.
These cars are a joy to experience. Best of luck on your delivery!