We stayed at this place for 5 nights, it is literarily about 100 yards from the La Sagrada Familia, and the metro entrance is just in front of the church. It is centrally located.
Svitlana is very helpful, friendly, and made us feel at home when we arrived in the afternoon. She also suggested several places to go for meals. We don't speak Spanish nor Catalan, so we had some communication difficulty, but our Google translation tool did come in handy.
The room is a bit tight but clean, and there is a small refrigerator in our room. There is an elevator in the building if you have heavy or big luggages to carry.
We would recommend this place if you are looking for something simple.