I recently rented a car in Ireland and though it was without incident (despite the very narrow lanes), there are a few things I would point out to others thinking of doing the same. If you plan to drive to Northern Ireland, be aware an additional 30 euro fee will be added to your charges. It does extend your liability, but we were surprised. It seems there is some ambiguity if you need to pay for the toll freeway leading into the airport - or if the rental company covers it. Anyone have insight into this? Safe driving out there!