We really enjoyed our stay at Dimitrios' place. It's a nice, completely newly, self-contained room with everything you need for a (shorter) stay in Athens. (I loved the light concept) Great location, close to Monastiraki station and its busy streets. We also enjoyed the neigbourhood with the huge Agora local market hall, food stalls and the Pakistani stores.
Dimitrios was a great host. Late self check-in was convenient. Dimitrios was always available in case of any questions or troubles.
As the description tells you, the roof terrace is a shared, common one. We were up there two nights though and were alone enjoying the briliant view of the Akropolis.