Perfect!
Location, host and the place is excellent!
It is indeed just walking distance to the Acropolis, Plaka and more tourist spots. There are also a couple of good restaurants and dessert shops along the street where the bnb is. Also not hard to find from the Acropoli station.
The bnb is like a cute homey apartment and it's a lot better than the pictures posted. I can also say it has everything you need. Towels and linens smell really good and the entire place smells good as well, so you'd think it's really clean.
We stayed for 2 separate nights and had to leave some of our luggage because we had to go to Santorini and Eleftherios was kind enough to keep our luggage in his small room at the rooftop of the building. He is a very lovely man, very genuine and is really willing to help. Also responds quickly to messages. He will recommend to you a local restaurant near the bnb where we dined in on our first night and it was great with a good value for money. We'll come back to this place in case we're back in Athens again.