It was very good to stay at Tia, Mike and Vaki apartment.
The apartment is very clean, new, and pleasant. All shared spaces are also very nice, and with complete structure.
It is a good location, and near several restaurants, banks and supermarkets.
Communication was also very good, with fast replies for all questions I had.
I strongly recommend to stay at Tia, Mike and Vaki apartment, while staying in Athens !