I've been using Airbnb more & more frequently over the past 3-4 years and I have to admit: This has been the best host experience I had so far.
First things first: The apartment is very clean, modern, cozy and well equipped (e.g. kitchenware, detergents, oil etc.). It is located perfectly in the inner city with access to public transport and a huge amount of bars & restaurants. Most of the popular sites can even be reached by foot. But the highlight is definitely the large terrace on the rooftop with a breathtaking view over the city, the mountains and the acropolis!
George is a wonderful host, always friendly, happy and with good recommendations for pretty much everything. He is very caring, always offering you a delicious coffee and providing you with water! You are treated like a family member.
I can only recommend this experience :)