We spent in apartment 2 nights.We were 4 adult people there. It is a spacious flat, with 3 bedrooms and full equipped kitchen. The apartment is in walking distance from Sagrada Familia, but it is in quieter place with cheaper restaurants and shops than around turistic area,and it has good public transport.
Mercedes, the owner, is very kind and helpful. She waited us in front of apartment and shown us everything we needed to know about the apartment and the area. We were very satisfied there and if I travel in Barcelona again, I would like to live there again.