Unbeatable location - very close to many famous places of Athens such as Acropolis, Syntagma square, Monastiraki, Ermou street. Really convenient to reach from/to airport, around 7 minutes on foot to X95 bus stop and Syntagma subway station. Communication with Alisa was excellent, she always replied us fast and was ready to meet at any time even when our flight was delayed. The apartment looks precious with its charm of classic style building having high ceilings, spacious and cosy rooms, old-fashioned kitchen with marble sink and stairs to sunny terrace. Our Blue Piano Room was big enough and had a pretty balcony to sit in the evenings. Bathroom was equipped with practically everything - shampoos, soap etc. even with washing machine. Under the apartment on the ground floor there is a good cafe with tasty and inexpensive dishes working till late at night.
The only con I'd like to say is the absence of A/C, but it is clearly written in the description, you just have to consider that if you are going to stay here in summer. At least there was a fan which really helped us.