The stay was excellent. Panos has been very flexible and friendly.
The studio is part of a group of 3 small studios/apartments managed by Panagiotis, who share a common entrance and a hall. The studio itself has a private door in this hall, with a key. It was extremely pleasant and clean inside, better than in the pictures. I had a lovely stay.
For people over 70 years old, as I am, you have to know that this studio is relatively high on Lycabettus hill and that you need to either take the stairs (equivalent to 9 or 10 ordinary floors according to my apple watch) or go up quite steep streets, which means that you should be relatively fit. I had no problem, but when I came home after work I was not keen on going down again to visit other parts of Athens or have a dinner. As I came to Athens for work, it was fine for me.
As everywhere in Athens, there is also the question of the noise. The place is more quiet than average, but the bed is near the window, and the window is no more than 2 or 3 meters from the stairs going uphill, which means that you cannot keep it open as some people go up or down the stairs and discuss there very often, and they seem to be in the room. So until 1 pm, you need to close the window and the rolling shutter, and then you can sleep well. But you may need to put the air conditioning. This said, I have already stayed in many places in Athens, including Airbnbs, 4 or 5 stars hotels, and there is always noise until late in the evening if you open your window.
I enjoyed my stay, I recommend this place and I will come back.