Originally Posted by
aa4ever
Hi, I should probably mention my experience, in case anybody comes across this thread in the future.
I tried 2 machines, neither of which accepted my US card (an AMEX). So I went ahead and got on the line. Line was about 10 min at 9am. Fortunately, I just made the train (by about 2 min).
so what? at 9am the RER 'B' trains leave fairly often from CDG (every 7-8 minutes IIRC)