I stayed in this apartment for 2 nights, and wish I could stay much longer :)
The location is perfect - at the center of vibrant Kalakni. Coffee shops and plenty of restaurants and supermarkets are within 1-10 minute walking distance. The area is safe (I'm a woman traveling alone) and quiet, and yet - so close to some of Athens' highlights (including Mount Lycabettus!).
The apartment is very clean and spacy with a lot of light. The kitchen is small - but well equipped (I found there everything I need, including espresso capsules). The bed is wide and comfortable. The bathroom is clean as well. the cute balcony, facing a courtyard, is a real bonus.
The welcoming and service were very kind and responsive. every question I had - was answered (in WhatsApp) in few minutes.
I've enjoyed my staying very much, and plan to stay in this apartment during my next visit to Athens.