If you eat at McDonald's in France and have wholesome natural beef hamburgers, fresh bread buns, fresh cheese, fresh French pastries and BEER you will NEVER enjoy an American McDonald's again!
Things that were closed: The Picasso Museum, the Egyptian wing at the Louvre, the catacombs.
There's a LOT of walking, which we expected, but to successfully traverse the Montmartre area you need to be part mountain goat. We did eat at the "Amelie" cafe in Montmartre and had creme brulee for dessert. It was cool that people can bring their dogs into restaurants.
The view from the top of the Arc D'Triomphe is absolutely stunning. The stairs to reach the top will kill you.
The value of whether or not to buy a Paris Museum Pass is up in the air. I guess I would say to go for it just to avoid having to stand in line at each museum to buy Yet Another Ticket.
I love cinema, but didn't feel the Cinema Museum was worthwhile.
Napoleon's apartment in the Louvre is a must see, but oddly several guidebooks fail to mention that it exists. The Louvre cafe is pricey but good. It cost 7.5 Euros for a slice of pizza which is ten dollars! We also discovered a British potato chip there that came in flavors such as Stinky Cheese with Onions, Roast Ox and Ham with Mustard.