This place was amazing. The apartment is stylish and clean. It looks even better in person than it does in the photos. Be sure to enjoy a glass of wine on the rear balcony while marveling at the beauty of the Acropolis.
Furthermore, the location is central and filled with great places that stay open late. You're near everything that you'd want to see during a visit to Athens. The major sites are within easy walking distance.
Also, Sakis is a great host. I arrived later than I'd expected and he met me at the apartment, showed me around and told me where I could grab a bite to eat. He also arranged for a cab to the airport. Definitely stay at this place if you have the chance.