I was there with my family (2 small kids), we spent in Athens 10 days and enjoyed the stay at the Vassilis' s appartment in Thiseio very much!
1. Communication before and during the stay: very smooth, fast and precise. We have received a great support, good hints, very warm welcome and fast communication any time.
2. Location: ideal for shorter and longer stays in Athens - it is very close to most popular places like (Acropolis, Monastiraki). Although it is very central, the street itself is calm, so we could have a good night sleep.
3. Appartment: big, modern, cosy, clean and fully equipped. Everything we needed was there, very comfortable to stay there also with children. Nice surroundings - you can go for a coffee to many nice places around, also farmacy and supermarkets are near.

We do recommend the place!