Konstantinos is a great host. He is super friendly and replied quickly to all my questions. Also, his apartment is well located for most of the main Athens sites, especially the Acropolis. The heat of Athens in August (it regularly hit 35 degrees Celsius) and the lack of air conditioning made our stay in the apartment a bit uncomfortable at times. Finally, at the very end of our stay, as we were about to get into our taxi for the airport, Konstantinos asked for my passport number. He said the number was needed for Greek tax purposes. I came to understand that he was right. But I wish he had asked me for this sensitive information at a more opportune time, such as when we checked in, so that I could have confirmed what he was saying with more patience. As it was, his request rattled me when I was already a bit nervous about the flight back. All said, I still recommend this place.