We enjoyed our stay at Anna's flat.
From the very beginning, Anna was very responsive and helpful. She even offered us an earlier check-in at no extra charge.
The flat is stylish and has everything you might need, located very centrally, in a safe district, so we could walk to many places by foot. There is also a metro just around the corner.
We had some issues with the hot water - but to be honest, we didn't report it at a time so maybe it could be resolved during our stay.
There is also no place to leave your luggage after check-out, so we have to use the lockers near Placa de Catalunya where the buses to the airport leave.
Overall, we had a nice experience and would recommend Anna's place.