Beautiful apartment in an amazing location right next to the Acropolis hill. Homer and Isabella were great hosts and helped us out with transportation both from the port of Piraeus and to the airport the next day, along with a great list of recommendations.
There was one issue with a lost remote control for the bedroom A/C which made sleeping difficult (we were on a one night trip) but we were able to use the slightly-less comfortable pullout couch. At the time it was a little late at night (around 1am) so I did not message the hosts, but in communicating with them afterward I realized they would have responded even that late. So for future visitors: should something go awry, Homer and Isabella are very attentive and will reply! I would definitely encourage future guests to make sure you have both A/C remotes handy upon check-in (in the summertime) as Athens is quite hot and the rooms become quite warm without A/C.
Overall I'd give the flat an A+ for location, style, and communication and just wish the unfortunate incident with the remote had not occurred.