Everything was great - so glad we stayed here.
First of all, everyone should be greeted on arrival at an airport by someone like Christos (thank you Christos!). We usually take public transport from airports (and did take the metro on our return to the airport, which was very straightforward) but treated ourselves to a pre-arranged car pick-up on arrival (easily arranged through Homer and Isabella). A friendly welcome, info about sites of interest as we entered the city, and he also handed over the keys making sure we could turn them in the locks before he left us! Door to door service - perfect.
The apartment itself has a lovely, welcoming feel to it - comfortable, spacious, nicely decorated and with all the amenities you could want. It feels like it's 'your place', not somewhere where other people have stayed before you, and will do after you've left! I only wish we'd had more time to enjoy it, especially the little outside terrace - hopefully next time!!
Location is also great. We specifically chose Koukaki and were happy we did. It's walking distance to main sites but we actually spent as much time as we could in the local area. There are excellent cafes, bars and restaurants (the pastry shop on the corner at the top of the road is good for breakfast - and late night snacks! - and we managed to get to the excellent Lolos on Geor. Olimpiou twice during our short stay!!), an antique/knick-knack/house clearance-type shop up the road which is great for a rummage (the resident Jack Russell will make you feel very welcome!), and a number of artisan shops for jewellery, ceramics, clothes etc. You also get a great view of the Acropolis if you walk up Filopappou Hill. (We did so in daytime; walking up through an unknown wooded hill at nighttime did not seem particularly sensible.)
Finally, Homer and Isabella are perfect hosts. Communication is instant and easy and the information provided beforehand concerning travel, access etc. is useful and thorough. There is also a folder with general information and detailed info concerning recommended restaurants throughout Athens and so on in the apartment. Restaurant info was also forwarded via Airbnb messaging, which I thought was a nice touch as we could have that with us while out and about.
All in all, a great place to stay. If we return to Athens (which I would like to!), I would definitely try to stay here again.