I stayed for eight nights at the apartment. Overall the experience was great. The apartment is comfortable and clean. I loved the natural light from the terrace. The location is very central to most of the historical sights. It is an easy 20 minute walk the Acropolis and around 10 minutes to a lot of restaurants. Public transport was easy as there is a bus stop on block over and the metro station is less than 10 minutes away.
A few things to note for travelers unfamiliar with Athens. Although the location is very central and convenient it is not a great area of town. The apartment itself is great and I felt completely safe inside the building. However I did not feel safe walking around the neighborhood after dark. If I needed to come home after dark I took a taxi instead of public transport. I was by myself so if you are with another person that might be different.