The location of the flat was excellent, as was our host, Fernando.
We had some trouble with the locks and he came right over and helped us. A must recommendation would be to get a brief tutorial when you get your keys. There are multiple subway stations nearby. Plenty of restaurants. The Corte de Englese nearby has a rooftop terrace which is a nice place to have a drink.
The flat is as described on airbnb. The stairs would be a definite problem if you have compromised health. Enjoy your stay, we did!