Beautiful modern flat. Perfectly clean. Everything needed is there. Added bonus is Ana, the gracious and very friendly host. She made sure to meet us on our late arrival and promptly communicated whenever we had a question. She also let us stay as late as we wanted on departure day so that we didn't need to carry our bags with us until the last minute.
Flat is well situated, in a quieter neighborhood but within 10-15 mins walk of Placa Catalunya. Also, the bakery "La Patisseria" is a block away for some world renowned desserts/breakfast items.
All in all, a superb listing. We would definitely stay again the next time we are in Barcelona.