Overall, the communication was smooth. They will try to sell insurance, but if you tell them you already have full coverage, they won't insist. If you don't understand something, you can use Google Translate. Greek drivers generally drive faster, but as long as you stay within the lanes, there shouldn't be any major issues. Remember to wait for the light when making a right turn! It is crucial to understand the right of way and always stop at stop signs. I still can't fully differentiate, so watch how others drive; being cautious is never wrong. This time we stayed near Athens, and the seaside scenery was great. I highly recommend renting a car. For refueling, the type of fuel required is indicated near the gas cap, and prices vary by station. You can check prices on Google Maps. If self-service is confusing, you can ask the gas station staff for help. For navigation, we used Google Maps throughout, which was very convenient for avoiding toll roads and highways (they charge for each section, which can get expensive).