Fantastic place and superbly situated, right in the heart of Athens. There were 6 of us staying and we all appreciated being so centrally located, so near to the major classical sites as well as the bars and restaurants of Monastiraki and Plaka.
Vivian was very helpful from check-in to providing advice, as well as arranging airport transfers, a car for a visit to Phaleron and organising a private tour guide for the Parthenon - special mention to the tour guide, Pangiota, who was excellent and went above and beyond her remit by helping us when one of our party got ill.
The apartment is very spacious and beautifully equipped/decorated. Only caveat would be if you are a light sleeper as the perfect location can be a bit noisy, but none of us minded!
All in all I would thoroughly recommend this place and we would definitely visit again.