Petros was a great guide for the day! We were there for just the day- but were able to visit almost the whole island! I really appreciated how well he communicated with us the day before our arrival and then again the morning we arrived to make our meet up as smooth as possible. He was super knowledgeable not only about Santorini, but of Greece as a whole too. He was very flexible and we were able to choose how much time we spent at the different locations on the tour as well as deciding where to stop asking the way. He always dropped us off as close as possible to the sight and then would go park the car and meet us with up. I would highly recommend Petros for a very thorough, customizable, and enjoyable tour of the island.