http://www.easyeverything.com/

We have used one Brussels and one in Paris and have enjoyed them both. In Brussels, we went up to the counter, bought a cup of coffee and paid for a ticket for the computer, and in Paris, we were able to just buy the ticket in a machine -- very inexpensive -- and you could buy sandwiches upstairs. It's right off Saint Germain and Saint Michel, for those going to Paris....very easy to find. It's about a half block from the Cluny.

Best regards, Sandy in Illinois

Mod's Note from Linda: The Easy Everything in Berlin, Germany, is fantastic and so cheap. I bought an unlimited weekly pass for about $7! Good tip, Sandy!