Liked: The employees at Sixt were friendly and helpful. The vehicle was clean and easy to pick up and drop off at the airport locations. Improve: Car insurance is required in Ireland so when making the online reservation, it would have been better if I knew to pay that beforehand instead of paying an extra €100 upon picking up the vehicle. Improve: The cancelation policy for Sixt is the worst of any rental car company. By not allowing a refund even if canceling a reservation multiple months in advance, makes me not recommend the company or choose to rebook with Sixt in the future.