Maria's place is fantastic. The apartment itself is beautiful. Recently renovated and very comfortable. We were four people for a week.
The location of the apartment is great. La Sagrada Familia is only 10 mins away and there are plenty of delicious bars and restaurants around. Also it's right next to a bus stop and 10 min walk to a metro making it very easy to get to other locations.
Maria was lovely and very communicative. She offered some wonderful tips of must eat places. Definitely follow her recommendations.