The apartment is clean and cozy. We were in Barcelona in winter, and there was no problems with heating - an air conditioner worked well, and there was warm at the rooms.
Mirella is a nice friendly host. Despite she doesn't speak English, we understood each other using google translator, so there was no problems with communication.
The apartment is situated at the great area. The Sagrada Familia and The Park Güell are easy accessible, also there is a big grocery market on 3 minute walk distance.