I would highly recommend Marcos rooms! It was in a fantastic location, down a small street that was in the middle of everything. It was in between the trail to ammoudi bay and other attractions like Atlantis books and Lotza (they have the best baklava). Im fact, anytime we tried to go anywhere we passed by the street that took us down to Marcos rooms! It was also great because while it was located in the middle of everything, the street itself was quiet and we heard nothing at night from the main street. Another thing to note is that we had the room in the basement, and there were some concerns beforehand about feeling claustrophobic, but the room was actually so big and got an ample amount of sunlight from the windows by the door that it wasn't an issue at all! Furthermore, the hospitality was great, and the couple that run Marcos rooms was so nice. We were served snacks really good cake and drinks when we got there and also the next morning for breakfast (along with other breakfast items). Overall, a great experience and would definitely stay there again if going to Oia!