We really enjoyed our stay. The appartment is cozy and clean, modern with everything you need.
The next metro is close, so commuting to the airport or into the central areas is easy. The supermarket is also very near and some local non-touristy food places. However we found the local a little bit far out and very loud (but maybe not uncommon in loud Athens).
Walking to monasteriaki is easy but if we came again I would book closer to the inner city so that we would not need to use the metro so much. But the apartment is still worth 5 stars as the price is extremely fair!