Me and my partner enjoyed our stay in this apartment very much.
It's a nice cosy flat, very clean and with a TV with Netflix, if you want to wind down after a day around the Acropolis :) The metro is approx. 5 minute walk, and gets you to most of the key points of interest (Acropolis, Monastiraki etc), and there are a few smaller shops around if you need to do some food shopping.
I have nothing bad to say about the host, who was always quick to respond to any questions, gave tips on where to go, and also argued with the taxi driver (who spoke very limited English, so we couldn't argue ourselves) when we arrived to ensure we get charged a fair rate for our trip from the airport to the apartment.
My only issue was that the neighbourhood was a bit run down, but we didn't feel unsafe.