While I didn't get the opportunity to meet Antell, they were very communicative both before and during the stay at their home. Upon arriving, I was greeted by Antell's son, Alex, who showed me around the home and offered some advice on things to do, he also made himself available via WhatsApp which was useful when I had quick questions.
There are several sets of stairs when arriving at the home, OR you can take a side road that is just a steep hill but may be more gentle on those with bad knees. The home was clean, all necessities were provided, and I really enjoyed having the AC during the daytime when I was at the home. About a 7 minute walk to the Megaro Moussikis metro station which will get you about most places you'd need to go including transfer stations, and there is a grocery market about a 10 minute walk away. Lots of neat & tasty local food places around, and the neighborhood was fairly quiet throughout my entire stay so no complaints for noise.
Everything in the apartment worked as expected, stylish and comfortable for most of the stay. Unfortunately the hot water heater didn't work the first two days that I was here. The first day I thought that I was not giving enough time when turning on the water heater, but I let Antell know when I realized that something may have been wrong and they had it fixed the same day I let them know there was an issue - so the responsiveness was very much appreciated.
Overall, great location, great hosts, and a very comfortable stay.