The locations is very central and the area is very safe. Hopon-hopoff bus stop is close also the metro line 3. The flat itself hist as on the pictures-small but has everything that you need for a few nights stay. The balcony has a nice view of the surrounding hills and city. Our only concern was the bathroom ceiling that needs mould treatment. (Note: if you are not a deep sleeper consider that there is a school under the flat with kids playing on the garden front early morning and the class bell ringing loud.)
Communication with the manager of the place Dimitris, was more like minimalistic (he was responsive, however usually he replied to the half of our questions..). The driver George on the other side was very informative,helpful and friendly! :) Gave great advices on what to see, what areas to avoid,etc. Kudos for him! :)
Overall we didnt have issues and the place is nice for a solo traveller or for 2.