Overall a fantastic experience!
Ilias's father, Nikos, was there waiting for us to give us the orientation of the place when we arrived. Ilias, despite being on vacation at the time, was still EXTREMELY responsive; and I sent quite a few messages since it was my party's first time in Athens.
The place was simply, but stylishly, decorated. Despite not having AC, it was quite cool at night for sleeping. It does get hot during the day, but we were mostly out so it was no big deal.
The apartment was situated in a local neighbourhood, with a sizable public market that springs up in the morning just around the corner from the apartment, if you are into that kind of stuff. There is also a super market just 3 minutes walk away. The tram station is also just a few hundred meters away, and it will take you to Syntagma Square, ie. center of Athens.
All in all a very pleasant stay! Thank you very much, Ilias!