It's good little flat in an excellent location - about 5 minute walk to Cava Baja - the Tapas Central (free tapas with every drink) - as well as other locations. There is a Carrefour (food shop) just outside the entrance and a metro stop just across the street.
The flat is in the attic and the bedroom itself is in the very low-roofed mezzanine - which is tricky to get in and out to (and more so if you're afraid of heights); but there is a sofa bed downstairs if that is an issue. Otherwise we have enjoyed our stay massively.
The host was excellent - accommodated well our delayed flight etc.