The apartment is located in a Athens city center and it is just walking distance to Acropolis, Temple of Zeus and other tourist attraction. Throughout the 5 days stay in Athens, we had not use any public transport to any tourist attraction at all, except we decided to go to "The Mall" by Metro. However, the Metro is closed due to strikes but we managed to use the bus which took us longer time instead of Metro. Metro and bus station is just a the back of the apartment.
The apartment is located just beside the shopping street but it is still quiet in the entire day. I am a light sleeper and there is no problem for me. At the surrounding, you can find any restaurants you desired, local Greek food, Japanese, Chinese, Indian, McD, KFC, coffee shops, and more.

Antonis (Host's helper) is very friendly and Alexis has given all the direction to the apartment 2 weeks before the stay and no problem for us to find the apartment. Antonis recommended us the restaurant he use to go to (even met him there) for local Greek food and where to go for groceries shopping for breakfast or if we wanted to cook.
The apartment is very spacious and modern, there is TV in every rooms and 3 bathrooms which is very convenient if there are group of people staying together. Kitchen is equipped with the utensil and cookware needed. Antonis even has prepared several bottles of drinking water and fruits for us. Every rooms has air conditioning and ceiling fan, I guess there will be no problem even staying during in the hot summer in Athens, although we only used the heater on the air conditioning as the temp is 5~15C during our stay in Athens.
The elevator is a bit small but sufficient to fit 4 big baggage and 3 cabin baggage with 1 person in 1 go. It is a old style elevator but still serve its purpose. :)
Antonis and many (even the libraian in Greece National Library) have warned us to be careful about pickpocket but we are lucky and nothing bad has happened as we stayed alert if anyone come close.