We enjoyed our stay at this comfortable apartment. If you are heading from here to the Acropolis or the Ancient Agora, you can take the metro which is nearby, however you can also take an enjoyable walk - it takes about half an hour. The apartment is just nearby Greece's national academy, and in this area it seems like every second shop is a bookshop or a place to eat. (If you are looking for English language books, try Tsigaridas Foreign Language Books, 10-12 Ippokratous street, which is around the corner from the apartment.)
Athina put us in contact with a taxi driver. On the second last day we were planning on an organised bus tour to Epidavros, but for two people a taxi was about the same price, and more convenient as well.
Thanks Athina - "Ευχαριστώ πολύ" - for your help throughout the process of booking, arriving, staying & departing.