Maria and Oscar are very gracious hosts, and helped us out a lot by providing a baby cot. The apartment is a pretty close (about 10 minute) walk from Sagrada Familia, and there are a few nice grocery stores and restaurants in the neighborhood.
The building seems to have a lot of AirBnB's in it, and the guy that greeted us at the door was not Maria or Oscar. This is not a negative really, just something to know. Also you can get a bit of noise coming in from doors opening and shutting in the hall. We had a very nice stay though, and recommend the apartment to anyone visiting Barcelona!