Originally Posted by wsflyer

The trains go to either the old in-town Reims station or the newer suburban station Champagne-Ardenne that the Strasbourg trains use. Just check the schedule: "Reims" is the older in-town station.

My wife and I took the train to Reims the week after it began running, and I would highly recommend it. The Reims station is within walking distance of the cathedral. In an afternoon, we toured two champagne caves and the cathedral before returning to Paris for the night.