Kostas's place was wonderful for a number of reasons, but the most important reason is Kostas himself. Incredibly friendly and helpful while still giving you the space and privacy to enjoy your trip. It was as if we were staying at a friend's house rather than an Airbnb. He greeted us in person when we arrived (with snacks!), even though our train hit delays and we didn't get in until 11 pm. We were able to text him throughout our stay with any questions, and he had plenty of recommendations for things to do, see, and eat. My girlfriend and I stayed at a number of places while we were in Athens, and some had better locations, but we both agreed that we'd stay here if we come back for the experience Kostas provided. The home itself wasn't lacking either - plenty of space, easily the most out of the places that we stayed. We could have comfortably had 2-4 more people staying with us. The design was very modern, the bed was very comfortable, everything was great. The neighborhood was nice (if a bit hilly, but that's just Athens) with plenty of shops and restaurants and a metro stop just a few minutes walk away. It's really everything you could ask for and a perfect home base for a trip to Athens.