What I found is that I do not use Expedia or Priceline - you often will get the lowest end rooms and they are not exchangable, cancellable or refundable. Sometimes, I will book and then check rates before I go. I have closer to booking changed to a non-refundable rate or if the rates are down will call the hotel and change the rate on the booking. Sometimes, if I am willing to pay an old rate they will upgrade me instead but still save money.

On TAP/Cross - the hotels near Monte Carlo were pricey to get something decent if you are doing the Grand Crossing. We loved the Hotel Hermitage, but, won't stay there again - we want to see more of France and will stay in Nice.