Tianchun's place is a great deal, perfect for a short stay in Athens. The location splits the difference between some of the most charming parts of the Plaka district and proximity to the metro and many of the best restaurants in Athens. The street that the apartment is on is quite charming as well and I do not think the photos fully do it justice. The place itself is clean and well-appointed, and the bed is very comfortable. The shower has a strong water flow and there are no weird plumbing issues which is a thing in some other parts of Athens.
A few minor quibbles: the bathroom has only one hook for hand-towels and bath-towels so I ended up draping things over handles and such. Perhaps Tianchun would consider installing a second. Also, there is a green emergency light in the hall that might bother light sleepers, so a sleeping mask might be worth considering.
Overall, very pleased with my stay!