Baratunde: The worst "world class city" airport ever. Often smells like an overflowing toilet, the Metro ticket machines don't accept U.S. credit cards, and there are no services. Next time, take a boat to Paris
Holly Bounds: If you are connecting in CDG, bring your patience. This is the most inefficient airport in the world. Flying to/from the U.S., you will most likely have to go outside security then go back through.