The hosts were very responsive and cooperative. We actually arrived an hour earlier than arranged but someone came out to let us in and give us an orientation to the flat and the neighborhood.
The location is unbeatable. Very close to Placa Catalunya but tucked in a tiny lane. Easy to walk to the Gotic, Born, La Ramblas and Garcia areas.
The only issue was the NOISE. Specifically the metal gate to the building slams shut with a mighty crash every time someone enters or leaves. And this being Barcelona, people are coming and going all night!