Prices were very high. Bottled water cost almost as much as a bottle of Heinekin and some glasses of wine.
LESSONS LEARNED: buy the Museum Pass in Paris, not from the US. We paid an extra $20 for each pass buying online from RailEurope.
The entry to NOTRE DAME, though covered by the Museum Pass, doesn't have a separate entry and you have to wait in the long lines with everyone else.
The Bank of America debit card was priceless. BNP atms were everywhere (except at CDG Airport).
If you want to go up the EIFFEL TOWER, certain towers/piers were being worked on and so were closed, but at least 2 or 3 of the four towers/piers were open when we were there twice.
Paris METRO CARD: we bought a Carte Orange (for 7 days), but were NOT required to have a photograph. They gave us the actual Orange Carte, but didn't require us to fill it out with a photo. We brought small photos and filled it out anyway, but NO ONE ever asked to see it!
SCAMS: we were took our second day in Paris with the 'gold ring' scam. JUST avoid anyone who tries to give you a gold ring - they'll come back asking for money.