Nice stay overall, Loukas is friendly and reached out very quickly after we sent him our arrival information. He is very accessible and answers messages quickly. He let us know that he could arrange a cab to pick us up from the airport which we took him up on (more on this later).
The apartment itself is great, modern, air conditioned and with really great views of the Acropolis. The bed is quite comfortable too.
The only downfalls were that the Internet stopped working one morning (inconvenient as we were trying to plan our day, though we were able to call Loukas from the phone provided in the apartment and he came and fixed it), and the shower (which is all concrete) is open to the toilet (e.g. there is no door separating the 2) and so when you shower, water gets all over the rest of the bathroom and a puddle will form in front of the toilet (making future toilet-only visits a little annoying as you have to put your legs off to the side to avoid getting your feet wet).
It is worth nothing that at least one other unit in this building is also being used as an Airbnb, we found that out when the Airbnber rang the bells of ALL the apartments in the building at 3am trying to be let in because they were locked out. Incredibly rude and ridiculous, but also a reminder that things like this can happen in apartment buildings.
Overall a great stay in Athens and we would stay again.