Our stay in the apartment was great. Elisenda was very helpful and the apartment was very clean and cozy, it made you feel at home. While it is smaller than it looks in the pictures, it was enough for a 4 day stay in the city. The walls were paper thin and you could hear the neighbors, but it was a very quiet neighborhood and building, we had no trouble with noise. The neighborhood is very pleasant, with small shops for everything you might need and the metro is right across the street. It was a 10 minute walk to Sagrada Familia, we barely ever used the metro.
We absolutely recommend this place and would surely return.