My husband and I had a really great stay at Marcos Rooms. The location could not have been better in Oia, and the rooftop terrace was perfect for avoiding the sunset chaos at the castle. The entire home was charming, and the hosts were extremely accommodating when we showed up earlier than expected. The only drawbacks are the lack of AC, although the breeze is sufficient if the door is left open. Also, there's a bit of a bad smell coming from the bathroom so we had to keep the door closed the entire time.