Maria And Giannis' place was the highlight of my stay in Athens (I stayed at 2 other Airbnb apartments in the city and none came close to this). Apart from being extremely central - 2 mins walk to the Akropoli metro station/stop, 3 mins to Plaka, 5-7 mins to the Acropolis - it was impeccably designed. Despite how well furnished it was (sofa bed, extremely comfy master bed) it had a fully stocked kitchen and numerous other small details like extra batteries, electrical plugs, towels, blankets, etc that would please any traveler but was also very spacious.
I have to give a very special mention and thank you to Giannis who was constantly communicative (though I never met him). He enquired about my check-in process, gave numerous recommendations, and was always dropping helpful hints that I could use (for e.g. we landed on Christmas day when everything was closed). All in all, I would consider the apartment one of the finest in the city and certainly one of the best that I've stayed in.