We stayed at this place for 7 days. Overall, everything was ok, although there are some things I think can be changed/improved at the apartment:
1. The apartment needs better cleaning. There was a lot of dust in the corners and on the surface, and some hair and the beds. Also, the bathroom needs a deep cleaning.
2. We were 4 people and there were not enough chairs in the kitchen (only 3 high bar chairs at the kitchen island and 3 regular chairs on the terrace, which can not be combined).
3. We eat mainly at home and lacked a big pot for cooking. Also, the quality of the pan is really poor, so the food sticks to it. There could be more decent cups and some of them have cracks.

4. There is a wardrobe and a drawer in each bedroom which are full of sheets, towels, blankets, pillows, so that only half of it's space or even less is available for you. Some towels have spots and are not white anymore but yellow or gray and need to be replaced.
5. The main problem of the apartment is mold on the walls and ceiling in one bedroom and in the bathroom. Although it may be a common problem in Athens, the big spot with mold in one of the bedrooms needs urgent attention.
6. Finally, the bed in one bedroom is really squeaky. If you have a sensitive sleep, you will wake up every time you roll over. The same is with the doors.
The things that we liked:
1. The apartment is very specious and stylishly arranged.
2. The location is great - close to the city center, metro and the area nearby is full of restaurants.
3. Communication with the owner went smoothly, and we had no problems with a self check-in.