Will I have any problems using my Visa card in Paris due to chip & pin

No problems. The only reported problems have been in using automated gas pumps, or buying tickets from kiosks. Buy your tickets at the window and it will be fine. No problems using credit cards for purchases, as long as you have notified your bank that you will be traveling so they don't freeze your account.

Yup, what Nancy said. We couldn't get our American credit card to buy train tickets at the self-service machines in Paris or Italy, but the ticket agents had no such problems. The credit card also worked perfectly well at all restaurants that would take it. So in short, as long as you are dealing with a human being and not a machine, you'll be fine. One side note - you might want to check into how much of a foreign transaction fee Wells Fargo charges. We used Capital One Visa which has no fees at all, but some credit cards can charge 3% or more.

Thanks for the info! What a relief. Yes Wells does charge 3% as do all the other cards I have. Oh well, not going to let that limit my spending or spoil my vacation. Thanks again!

And the reason why machines don't work, is that you have to authorize the charge via a PIN, and on these machines, the PIN is validated by the chip. No chip means no possibility for PIN validation.