Expect Anthanasio's place to be big and spacious - there was plenty of space for my family of 4 and our 2 big and 2 small luggages. The view of Temple of Zeus and also Acropolis from a distance nice as well. There is a small balcony, so it would be lovely to sit out there in late spring/summer to enjoy the view.
Anthanasio was very responsive and quick throughout the booking process and also during our stay. Unfortunately the wifi was not up during our stay and he quickly showed up with a SIM card with data plan for my family to use. He topped it up quickly when we run out as well. It was not convenient as the kids could not access their devices freely but that simply meant they had to spend time with family :) And again when we did not know how to work the air conditioner/heater properly, he showed up to tune it for us and even offered to send a technician to look into it but we turned it down as we could manage.
The apartment is very close to Acropolis Museum, Acropolis and also the Panathenaic Stadium. It is about 15mins walk to Plaka, Syntagma Square - so take note of that if you are looking out to be closer to those centers (but they are very crowded). As the apartment is closer to residential area you can find inexpensive breakfast cafes.