We absolutely loved Gianna's apartment, it is spacious, well equipped, she left us plenty of food (plus the kitchen is great for cooking) and the location is excellent - the neighborhood is great and much more authentic than Plaka or Monastiraki. Supermarkets and nice restaurants and bars are very close. It is ideal for a couple or couple with child.
We just had two issues. One was at the check-in, which we let her know that we didn't have data on our phones ans asked more than once how to contact her once we arrived (by intercom for example). We waited 20mins outside until her friend arrived and showed us in. The other was that the lights went out in the apartment (we just had water heating and cooktop on) and after trying to contact Gianna through sms unsucessfully (wifi was off too) we had to walk 20min to a restaurant we had lunch previously to use their wifi. She fixed the problem quickly, but there should be instructions on what to do if this happens.
Regardless of that, it was one of the best Airbnbs we ever stayed and it was a big pleasure to meet and talk to Gianna on our last day (she was travelling before). We would definitely stay there again!