Alex's place was great for our stay.
Very centrally located in Athens - an easy walk to all the sites and shopping. There were lots lf bars and restaurants nearby to choose from. Alex was very kind and accommodating and let us check in ealry.
The only thing I would caution you on booking would be it was very loud late into the night due to the club across the street (you could hear the music and people talking outside cleaarly) . If you are lite sleeper or are traveling with kids perhaps this may not be for you. (Also we were there on a Saturday so maybe it is quitter on the weekdays)
If you dont mind a little noise at night or want to be in the Athens nightlife - I would reccomend Alex's place!