I can recommend this apartment very highly. We stayed 3 nights in April 2016 as a couple.
It looks exactly like it is in the photographs. It is small but perfect for two people and has everything you need. The decoration is really tasteful and quirky. We loved it.
Theodore provided helpful a detailed directions to find the apartment. He met us as arranged and gave us a warm welcome and a thorough tour of the apartment and explanation of the facilities. He also recommended where to go that evening - a Sunday night stroll near the Acropolis and dinner in a café near Thisio - this was a great idea and a perfect first night in Athens.
The apartment has a great shower - hot and powerful! The bed is firm but comfortable. There are lots of thoughtful touches like a universal adaptor plug board and the kitchen is fully equipped.
The supermarket is only two minutes away and we cooked dinner one evening and breakfast each day in the kitchen.
The metro stop is only 2 or 3 minutes walk away and you are only two stops from Acropolis. Apparently you can also walk it but as the metro was cheap and quick we relied on it.
We didn't go to any restaurants in the Neos Kosmos area but Theodore had left recommendation of a few.
The area is quiet and residential.
We were very happy with the apartment.