Christos and Liliana's place is in central Athens. It's about 17min to Acroplis and 5min to the nearest M3 metro. It's close to two grocery stores and some cafes, and it's very walkable to other busier areas too.
The place itself is super lovely. Very clean, and the furniture and decorations are unique. There's a nice back yard and a beautiful rooftop where you can see the sun setting behind the hills.
They were very accommodating and adjusted check in time because our flight.