There have been a lot of questions about the usefulness of a PIN for a standard USA Visa card that is not designat d a "true" chip and PIN. We have a Bank of America Visa that is your standard chip and signature card---when used in Europe the machine spits out a receipt for us to sign. Never challenged it by trying a ticket kiosk or other unmanned paypoint that requires a PIN.
But for this trip (we just arrived in Germany) I saw the opportunity to set a PIN on line when I did our travel notification, so I did. Upon arrival at the Munich airport, we used the card to buy the Partner Tageskarte for the S-Bahn into the city. The machine asked for a PIN and it worked just fine.
I just bought Inwould mention this, as many say the PIN that comes with a US chip-and-signature card is only useful for getting cash from an ATM ( something we would never do with our Visa card.)