Really great place to stay. It is stylish, spacious, comfortable and safe. The location is the best thing about it. It is so so near the monastiraki station and along a busy street full of food and shops. It is convenient to walk to all the main attractions Athens has from here. There's a balcony where you have a view of the Acropolis in the distance which is nice. Another thing I was very very impressed by was how quiet the apartment was even though it is located on such a busy street. The soundproofing is superb. You will definitely be able to get a good night's sleep here. I stayed in another airbnb also in monastiraki area which did not have soundproofing and it can get really noisy at night because the night life there is really vibrant. So this apartment is really really great in this aspect. The host is really great too. Responds fast, and is extremely welcoming and friendly. I actually forgot to return the key because i was rushing to the airport for my flight but Evan was very kind about it. I am really grateful.
In conclusion, stay here. You won't regret it :)