Phaidon is very friendly, helpful and knowledgeable. He gave us some information on the area, including plenty of recommendations for food, and all the places we tried were excellent. He also helped us by calling the bus company to check the times as it was not clear from their website.
The apartment is in a very convenient location a few minutes walk from the Acropolis Museum. It is quiet, comfortable and well equipped, and I would happily stay there again.