Definitely recommend this place if you're visiting Athens. I stayed for over a month, and loved the terrace, which gets loads of sun in the morning. The kitchen is really well equipped, and was more than enough for a long stay. Having a coffee machine was a bonus. The apartment is really well located - you can walk to Monistiraki in 15 minutes and Thisseo in about 10 minutes - you can walk to anywhere in central Athens very quickly.
The host was super helpful, and responded very quickly, and was really kind in letting me be flexible, extending my stay and allowing a late check out. The best Airbnb host I've come across in my travels! If your coming to Athens, definitely consider staying here.