Marios's airbnb has a wonderful view, great location in the city center, and is very clean and well taken care of. He is always reachable and always very eager to help. I should mention one problem I had, concerning the heating. Unfortunately, during my stay, Athens was facing particularly cold weather. This airbnb only provides heating through the AC, which is not enough for very cold days. The cold weather, and some other technical failure, also made it difficult for the boiler to work properly, so there was only lukewarm water throughout my stay. Despite these difficulties, Marios did his best to help. I believe that if alternative/additional heating is provided in the future (e.g. a space heater), and unless you are visiting on a particularly cold day, this issue will not arise again. All in all, I highly recommend Marios's place and will likely revisit myself, despite some difficulties.