It is not about being extreme. Bring a video camera. Have 1 person record while the other works with the dealer. Have the dealer not only tell you how something works but have him demo it for you and then you return the demo on each and every item. If it moves or turns on etc you want to operate it. Have them open up the compartment w/ water heater and water pump and show you the winterization/due winterization process for your trailer. Make sure you know where your low point drains are. Run the heat and the ac. Climb on the roof. Check all caulking for cracks, roof and sides for signs of leaks/ due lamination. Open and close all drawers and cabinets, make sure they operate smoothly and easily. Run slides in and out. Lights(interior and exterior all work). Dump valves for all tanks (which valve is which tank etc). Run the awning out and set it all the way up. Bring the awning in. Are they installing a wdh for you? If so have them show you how to do it. Take TT all the way off the ball, hook it back up, check position of TT on ball, how the wdh is supposed to look when set up (trust me these are things you will want to reference later), practice this again when you get it home. Play a cd in the radio and check inside and outside speakers. Play the TV, does it have a DVD player? If yes bring one and play it. Be through. Do not give them any check/money until the pdi has been completed to your satisfaction. Once they have your money they will try to push you out the door and start the next pdi. You may want to call and warn them that you want extra time for your pdi. Don't be shy, ask questions. Insist the unit be perfect before you take it so you don't have to bring it back under warranty. If you have kids, get a sitter and leave them home so you are not distracted. If a sitter isn't possible bring entertainment for kids. We had my 5yr old (then 3yrbol) sit in the camper watching a movie while we did pdi. We were still a little distracted keeping an eye on her. Don't get caught up in the moment. You will be so excited and dying to bring your new baby home. Postpone the homecoming if something needs to be fixed. You will get it back quicker this way. Most importantly, have fun!