My friend and I had a fantastic time staying at Katerina's apartment. Katerina is a great host - so nice, friendly and helpful. She was brilliant from the moment we booked the apartment and all during our stay. Georgia, who checked us in was also terrific and really nice.
The apartment itself is great: it's got everything you need and is full of character and personality, with a very eclectic collection of CDs and lots of books, in Greek, that you just know would be excellent. And then there is the rooftop garden - as good as it looks in the photos, with a view directly to the Acropolis on one side and Lycabettus Hill on the other.
And the location is perfect. It's very central for exploring Athens, but in a nice quiet residential block, and only a couple of minutes away from the Panathenaic Stadium and the National Garden (a brilliant few minutes stroll through the National Garden takes you right into the heart of Athens). Aristotle's Lykeion, and a bunch of excellent museums (the Benaki is outstanding) are also just a few minutes walk from the apartment.
Pagrati itself, where the apartment is located, is an excellent area well worth exploring. It's got a nice, laid back buzz, and loads of good café-bars and restaurants. Varnava Square is only a couple of minutes away and the streets around there are full of nice places to go.

Staying in Katerina's apartment made me feel really at home in Athens and I hope to come back soon. I loved it here.