We are from the UK and had booked our previous Celebrity cruises through a US agent with no problems. For our transatlantic cruise this year I discovered it is much cheaper to book through agents in other countries, especially within 3 months of the cruise. We had booked a sky suite for this year and managed to cancel our booking (paying a $50 cancellation charge to the agent) and rebook a Royal Suite with the Celebrity agent in France and still save $400. You can easily compare the price by logging onto www.celebrity.com,
on this page look for where it says 'Not from the US
on the left of the screen. Change this to France, Germany or Australia and comparing the rates. The only word of warning I shall give is all the cruise documents are in French, not a problem for us as we've only ever got e docs before.