I would say that the apartment has the best price for the zone. It is like 15-20min away from Monastiraki (by walking) and 5-8min from Omonia square.
The space was more than enough for our group of 4 persons and it had everything we need (three rooms + livingroom).
Nestor was a great host and responded to every question I had during my stay there. Check in was really easy since he took care to document everything in detail and inside the apartment you will also see tips and house rules sticked right in the places where they matter.
Useful to know (or what I asked/informed Nestor during my stay):
- Hot water is based on a solar system. If there are rainy or cloudy days you may be low on hot water. I recommend showers in the evening in this case since in the morning the water may be cold.
- If the toilet water is not working just shake a bit the lid of the reservoir and it will start to work again (I already informed Nestor to have a look on this)