I highly recommend Ioannis' flat for anyone staying in Athens. My traveling companion arrived from another city to check-in to the apartment before me. Even though this complicated things a little for Ioannis, he was perfectly gracious and helpful and made sure everything went smoothly. The apartment itself was clean, stylish, and very quiet---despite being above a lively street in Monastiraki (filled with locals, not tourists). There were 3 of us total, and we were very comfortable. The location is truly the best part; you are a short walk away from great sites, restaurants, metro station, shopping, etc.