Our stay at Leonidas' house was lovely! The apartment is cosy, elegant and very clean. The location is very good, a walking distance from the Acropolis, and a cheap taxi (up to 5 euros) away from most of the city's attractions.
Leonidas was very helpful in every little thing we needed, with a friendly and hospitable attitude.
Our stay was much better than anything we expected. Whenever we'll be back in Athens (and we'll be back, we fell in love with the city), we're going to stay in Leonidas' and Nikos' apartment.
We highly recommend it!