I checked into this too (for Italy) - first step was going to my bank - if I recategorized some of my accounts I could qualify for ‘no foreign transaction fees’ abroad (from the American bank side of things).
In terms of the fee on the European side - I think it was about $9 from an ATM per withdrawal (with a few hundred dollars daily limit). It honestly didn’t seem like all that much in the grand scheme of things - but if you are staying for an extended period that might be more than you’d prefer…