Giannis's flat is located on a pedestrian street full of restaurants and cafes. It is quite spacious and comfy. Everything needed was within a walking distance: underground station with a direct connection to the airport is just 5 minutes away, Acropolis is about 15 min walk, supermarkets are about 5. Fast food, cafes and other places to eat are aplenty literally everywhere nearby. Although I have not had a chance to meet Giannis in person, he left very detailed instructions regarding the check-in process and replyed pretty swiftly in messenger. The only thing to consider is a level of noise from the street which might not be suitable for someone unaccostomed: restaurants stay open and people keep talking till after midnight, so earplugs will be a nessesity if you want to go to bed early. Otherwise it is a perfect place from which to explore the city and try all it has on offer.